They're definitely a problem, and moreso now because of War of the Spark's "lol 30 f'n planeswalkers" gimmick. But I think the emphasis on creatures at the expense of spells is slightly larger. Look, if I wanna be a fucking pokemanz wrangler, there's a game for that shit already. I WANT TO BE A WIZARD CASTING SPELLZ, NOT A ZOO KEEPER WOTC PLZ