If you're talking about HM taking in TKR as growing too large then you can't blame Keegoz since E404 and CotL merged then dipped to become a MInc ally fairly quickly. Any subsequent sizeable gains in HW can't be blamed on Cata since they weren't even there.
You tried to stop them from growing and then what, helped them establish the greatest power the game has seen in a very long time?
T$ owes the game, especially the alliances that made up Oasis Inc, quite a bit when it comes to this, considering it rolled 2 spheres for the exact same thing it's just done.