(SC2) Total Conversions?

Hi, for people that have been exploring SCom2 modding, a question.
What scope does SCom2 have for total conversions? ie. cleaning out everything and using it as an engine for an original RTS.
What parts of the game mechanics are hardcoded into the engine and cant be changed via lua/asset changes?
What about out-of-game stuff, like lobbies, gametypes, loading screens, etc?|||Hmmm. Sounds intriguing,and possible, but i don't think anyones going to do it on pc.

Until UI and map modding get truly figured out, there wont be any conversions any time soon....unless you do one.|||Well (not that I ever get off my *** to do anything), I'm examining the suitability of SCom2 (or SCFA, I guess) as an engine to test some RTS ideas I had.
The alternative is to roll my own engine from scratch. (in which case it will be symbols for graphics and no pathfinding, terrain or AI :)|||Here's a list of what hard-codded into the engine or complied in a format called BDF which is a shame
1.The UI the only things that are moddable are dialogs like the unit rename, the F2 spawn menu things like that.
2.The Maps are all complied just like the UI files are.
3.The AI is hard-codded into the engine so adding new factions, engineers, factory's and change Aeon to support naval units is all not possible because of this.
So really a total conversion isn't worth it even know the engine is.|||That's a shame. Oh well, roll-my-own it is maybe. Or FA.