Guess I'll give my reasoning for my votes, too:

I think the rules are fine as-is: however, if pressed to remove something it would be the Size limit because it has been lampshaded pretty thoroughly. I still think a Colossal creature is too big, but I think that's something we can mentally make a note of without having it be a barrier to the FBS list.

Full disclosure: My guess is the ANB, and removing the Size limit would strengthen its case; that did NOT factor into my vote, but I want to acknowledge it in case someone tries to call me out on it later.