And it'll be bug free.
Sure it will.
They have like 15 bug testers who are all active, and they're not your usual slow modders - they usually fix bugs within a day of being reported - just read the beta impressions threads.
Considering what I've heard about the planned Gainax-esque ending to Sith Lords, I'm not gonna touch it.
Look, I played a leaked, buggy version of Team Gizka's restoration of the ending, and I found it to be vastly improved upon the original retail version. It certainly blows away PS:T's ending by a mile.
And I'm not sure what you mean exactly by Ganiax-esque ending. If you mean everybody dies, that only happens if you go dark side. And even retail TSL is far less obtuse about it's plot and ideas than Evangelion ever was. I mean, it's an openly intellectual story with a lot of philosophically oriented dialogue, but after four playthroughs I'm pretty certain there's actually something to Kreia's teachings (which I wrote about in another thread in this forum) and it's not just a bunch of profound-sounding drivel, so I think your fears are unjustified.
Will they add a version of M4-78 better than that mod that was released. I hated it, just like pzuzles from other planets all put together. Not to mention shotty dialogue in terms of writing and voicing.
They're also working on an M4-78 Enhancement Project, which will alter a lot of the old mod and replace the old voiceovers with better ones.
http://www.deadlystream.com/showthread.php?t=102