If Arcaea only ever has two options (do nothing and be bored, or roflstomp a realm and making FEI boring), then they really suck and don't care at all for the rest of the players.
How long would it have taken for OW to be destroyed? If they had decided to wait just a little to let that happen, and then striked Coralynth (and ONLY Coralynth), then maybe it wouldn't be as bad.
It really doesn't matter how badly Coralynth messed up, it should have been handled differently.