I would rather have a new FPS Creator 2, rather than just an upgrade for the current program.
But if there will be an upgrade, i would love if these features was to be added:
The map size should be alot bigger, maybe even eight times as big as it is right now.
A terrain editor/system.
The physics should be removed and replaced with a better physics engine, such as Havok Physics. (
http://www.havok.com/products/physics )
Dynamic entities should have the same shadow detection as static entities. It looks very ugly when a rotating fan or a simple door is brighter and less shaded than the rest of the environment.
The ability to add areas of liquids, instead of covering the entire map with liquid based on the water level. You should be able to select a certain area and add liquid to it. And you can choose if you want the liquid in the area to be clean water, dirty water, radioactive water, lava, acid, blood, etc.
Lens flares should be fantastic.
Improving the stock items, especially the characters would be a good idea. (adding more details, etc) As well as adding the X10 exclusive items to FPSCR, plus some more stuff to attract more customers.
You should be able to choose what character model the player should use.
The player should cast a shadow of himself/herself, like in S.T.A.L.K.E.R., Where it points away from the light source, just like in real life.
Working mirrors and reflective surfaces would be great, as it has many uses.
The ability to "gib" enemies. (blowing them up into pieces of meat and blood). You can disable this in the entity's options.
Character animations MUST be remade. I hate the current standing animation, which looks like he's having a spasm every fifth second.
You should be able to have much, much more entities in a map, as there is a limit in the current program.
You should be able to have loads of enemies without having a crash or extreme lagging.
Better compatibility to Windows Vista/7/8. If you update the program, you'll have to edit the userdetails.ini, otherwise you'll end up with a FREE version of FPSC. This MUST be fixed.
An air meter should be added. This way you'll know how much air you got before you start to drown.
The categories should be better. Instead of having the space guns in scifi/items, it should be in weapons/scifi.
I got much more ideas, but i'm too lazy to write them all down right now.