I havent experienced this? However, the "Focus on insert chess piece" double teaming is a thing. Its been like that, for as long as I can remember, especially on weekends.
Numbers have been pretty much even, +/_ 3 or 4 players. IMHO...it is working just fine.
I mean really...loose a map...a base...whatever, it will come back around. Dont take it so personal! With even numbers, the Tide is sure to turn! At least the Griping on 200 about ENY has been pretty much Non-existing 
Your "Happy go Lucky " attitude works for you, but some players like the OP play this game for the "Win the War" play. While both ways to play are fine, the OP shouldnt be brushed aside because his play style is different.
Last night the Bish were getting hit by hordes on both fronts for most of the night. Once they got together and started defending the Rooks moved up north to try and grab bases from the Knights, which they did because the Knights were slow to defend. But once they did the Knight/Bish front went dead and the Bish started getting bases back on the Rook/Bish front. As the night wore on the numbers tho fairly close to even all night begain to dwindle and the fights and base captures sputtered to a stop.
While the numbers are looking even you still run into the "ganging" of one team. Last night it was the Bish getting ganged until the Rooks moved to the other front and then Im sure the Rooks thought they were getting ganged. Id like to see a base capture limit set up.
One team can only take 2 bases from one team before they must switch and take a base from the other team. This way one team may be under attack from both sides but relief will come once one of them captures 2 base and MUST move to the other front. No longer will you see two teams ganging up on one team and taking bases until they are down to 30% of their own bases before they turn to race each other for the win. Plus it keeps the fights moving around the map so everyone gets some fights.
I wonder what would happen if one side was axis and one side was allied planes with the side balance thing?
It seems it would be easy to set up.
The game would close in a couple weeks. They would leave in droves if history can be counted.