Sure, it's nice when the meta changes, because new decks rise.
But we should also try to add cards that enable players to try more combinations, i don't think the problem is to maintain old decks, but to make a more diversified meta.
Right now the possible decks are: mono, duo, trio, and rainbows.
Quad decks are treated like rainbows, with quantum pillars and nova/supernova, and trios aren't very reliable.