I'm not against GB's, BUT I'm against how the GB's have evolved until what they are now.
The solution is simple, but INNO just don't want to implement it!
For everyting with different levels in this game they shall use a real exponential curve, sure not the curve where the benefits are quicker growing than the effort.
But NO, INNO only cut in the rewards when the GB is already in extreme high levels.
Just reballance everything using decent reward strategies, and everything will be fine again.
INNO has changed the game completely after playing several years, and changed the focus from fighting to endless pushing.
And indeed you are right, now they only deliver after an endless time only a quarter of a new era. And after months of waiting there is no new update to be expected soon, only useless recycled events.