It's an interesting situation. Switching up the traditional alliances might just be enough to poke me into getting back into BM.
I disgaree. Arcaea has been too big for any other single realm to fight for a while now - for at least for the past five years or so. But has that made the island boring? Was the massive, continent-wide war we just had boring?
The shrinking of the island has made it more difficult to have a private war without involving everyone else, true. The type of smaller wars Kindara had against old Cathay, C'thonia and NeoSartania would be more difficult have in the current environment. But I don't think this translates into "nothing interesting can ever happen, ever".
I thought it was boring, but maybe I just joined too late.
What I'd fear is that it got gang-bangs into peoples' heads. Coralynth seemed unable to even consider the concept of a 1v1 war, even against a weaker enemy the leaders wanted to bring in others. "Let's gang up on our enemies!" seems their default reflex.