Are powerful basics taking over the game?

With the addition of Arceus Ex, we got another powerful basic pokemon with little to no downside. With the addition of even more trainer cards, deck slots are becoming a very limited resource. I wouldn't be surprised if in the future, the meta becomes running a bunch of basics with trainers.

Two of the most powerful brews I've been experimenting with since the new set involves running 7 basics with ramp and a myriad of trainer cards.

Are basic pokemons taking over the game?