I agree with your observations about the GFI. I have been working out the math on how this gets to 6, and the 5/3s are just going to get in the way a lot. It does seem like you want to go either heavy into 5/3 or all x/2 agendas to smooth out the scoring plan.
I think the second Merger is foolhardy since it gives the Runner a way to win on 2 steals rather than 3.
Thanks for the feedback.