If I may just pick up on one point (nothing to do with reducing alliance sizes Remy - relax).
The "same 3" (or 4) allies fighting for top spot isn't affected by the number of members. It has always been the case (I seem to remember saying "t'was ever thus" in a previous thread).
And Ult (or whoever is the dominant alliance of the moment) has always won (and will always win) every round unless "the rest" block against them. So it wouldn't be 2v2, it would be 3v1 - or Ult would win - again!
(BTW - making alliances smaller would just make the top ones even more "elite" and reduce those people relegated to the "new" ones to farm status). Sorry Remy.