I'd rather have a larger map pool.
I still don't understand why there's a rotation instead of just cumulatively adding maps over time.
Oh really? I think it was this year or late 2016 when there have been 4 new 2v2 maps(Elst, Schilberg, Pripyat and Lisores) added to the pool. And the last 2 mentioned maps are regarded as being giga-trash by almost everyone who plays 2v2.