I'm not sure how anyone else feels, but I think I will wait for TGC to update the engine. There are many reasons, but to name a few:
1. I believe it will be free, but maybe not.
2. I'm sure it will be tested and compatible.
3. I trust them.
4. I don't know you from Adam.
5. Support issues.
6. I don't think that they will disappear anytime soon.
Even if you were to offer it free, I would have my doubts about any third party engine work. I also think that people should try to complete their work before they offer to sell it. The flashlight you mention only worked after the end user made modifications to FPSC on his own. There was a bit of confusion from even the few who got it to work.
Like I said, I don't know you from Adam. I'm sure you are a great and intelligent guy and have only the best intentions.
Crazy Grandpa