Harrold Andraste said:

The 'what if' is important insofar that we realize the "plot", what little there is, would be the exact same had you replaced Kreia with a generic bit character. And that the plot did nothing to actually serve Kreia's supposed plan.

Replacing Kreia with someone else would only work if that character did the exact same things Kreia did and was after the same goal as she was. The plot doesn't move without her. Also like I said Kreia brought the deaths of the remaining Jedi, Atris, Nihilus and Sion. I'm not sure why you're downplaying her significance when she IS the center of everything.

As it pertains to her plan I guess she gets The Exile to kill all of powerful Force Sensitives. Then maybe she convinces the exile of her plan and if The Exile refuses she subdues him/her and puts him/her in stasis. Then Kreia hunts down all of the lesser Force Wielders, kills them and then offs herself which kills The Exile in the process due to their Force bond. This wouldn't do much in the long run but her plan was at least something different than the whole "rule the galaxy" shit we've been accustomed to. I mean how many times have we been subjected to that same motivation? That's part of the reason why I couldn't dig Malak. I was expecting something different with him seeing as how the game took places thousands of years before the OT.