It's better, but it's not quite what you need. I'm actually pretty tired to give it any thought, I was woken up early, didn't get the best nights sleep and I have to look after a pregnant cat who's going to have kittens today, so I'll just give you other advice rather than an analysis.
Firstly, re-drafting is the who;e fun of writing a story, and you've got to be able to analyse your work as you go through and as your proof-read with all your purposes and what you need to do in mind. First drafts are never good, I like to think of them as 'idea gathering', you're creating a general discourse of the chapter and adding all you want, as you proofread it, you go around strengthening parts and making it good and you do this more than once (I've redrafted my prologue 5 times and it still needs work, chapter 1 will probably under-go less because I'd be acquiring in mind mind exactly how I'd be writing it.)
One thing you may need to do in writing is research around the subject, I used a waterfall in my prologue and that would mean I'd need to remember last time I went to a waterfall, though it would probably be better that I visited one. Research can help with how you write it, so really this is an excuse to watch loads and loads of Sci-fi
Though you don't take ideas from there, but think about the environments and the overall effect caused by the sci-fi genre and anything you can use with out 'stealing' ideas. Though say your characters are on a planet, and you have certain environments, it's good to actually experience them, if that's not possible, like say a Jungle, then find as many documentaries on Jungles you can watch, there's an episodes of 'Planet Earth' that is focused on the jungles around the world and luckily you can watch them online.
Though you're not going to pick up as much.
As I said in the other writing thread, never force writing, it'll turn out goo and the mistakes will be noticeable, you've got to write when you've got the inspiration, if you find you can't write anything, an experience that's likely to occur, find ways to cure writer's block.
I actually picked up a book on story writing, I've only read the first chapter, but I think it contains some useful advice. One of which should help plan out and structure your story efficiently as well as to act as an aid to avoid/overcome writer's block. These solution seem quite active, but I'm sure implementing what you can will be useful.
Taken straight from the book:
1. Write the numbers from 1 to 20 on a large sheet of paper and fill in as many gaps as you can. If you know how the story starts, that's number and if you know how it ends, that's 20. You probably won't fill all 20, but by doing this it'll help give a sense of structure and balance.
2. Index cards are useful in structuring the story. Write down as many plot events as you can on individual cards, and then you can change the order if necessary as the story comes into focus.
3. Never go anywhere with out pen and paper. (This is advice I sometimes wish I took, because inspiration can strike anywhere and when it does, you want to write it down, I've lost good ideas as I didn't have pen and paper handy) It is at the planning stage that ideas can strike without warning.
4. List the reasons why you want to tell this story.
5. Some novelists try to manage more than one story at a time - this is a rare thing to do. If you do have more than one idea on the go, or are contemplating several ideas, jot down an outline of each.
6. If you're looking for an idea, trawl through newspapers. Although news reports are usually grim, there us little doubt that stories often have dramatic potential. Have a look at the following and look at their potential, all of which as real examples.
-A six year old girl threw herself in front of a train and killed herself because she wanted to become an angel and look after her sick mother.
-A man kidnapped the son of a millionaire friend because he was missing his own children.
-A man and woman who met as strangers discussed their separate domestic problems and decided to kill themselves.
Another thing from this book may help you with that extract there.
Of course, note the difference between a plot and story, you want this to be a plot. An example of differences could be:
'The king died and then the queen died' is what would make a story - a series of events arranged in a time sequence. The plot would be:
'The king died, and then the queen died of grief.' Here the is that time sequence with an emphasis on causality. Though this was one man's comparison. This is basically one event makes another event happen. Plot's work better as something satisfying to the reader - with it there are usually questions and then incidentally answers (if needed) like, why did the King die? What did she love about him so much to be that grieved? Or your general 'What happens next?' (The key question to suspense) or 'how did we get in this mess? (A key question to mystery)
Then the book goes onto talking about 'process', which is an event which occurs in time and has three aspects (Though pretty obvious) the beginning, middle and end (Though I always think 'climax' is between middle and end as it generally ties the two together, but I dunno, the climax wouldn't be in a set place
) Here they extend the Queen and King example - which based on that simple line extends the story a bit further:
"The queen died, no-one knew why, until it was discovered it was through the grief at the death of the king." Typically this small bit follows the plot-line (The beginning: Queen dies. The Middle: The investigation. The end: the discovery). And there already is the marking to a murder-mystery with a romantic twist.
Of course the plot should be complete. If you like to think of things as lines, a story is a straight one, a plot is one with a series of loops that often come back on themselves through the journey in order to complete it. But that doesn't mean tie up all of the loose ends, just the reader needs to be able to answer the majority of the questions raise through-out. Like in this instance - Why did the queen die? Then the answers don't need to be explicit (She died through the grief of the king) as it all can be implied. If when given all the information and the reader can't answer the question, they'll be confused, so keep your readers happy.
Hope that helps.
Hakuna Matata