I don't mind it, most of them are cheesy gimmicks anyway.
The only two interesting ones, Abathur and Medivh, are being picked already. Not only they change dynamics of a team fighting, but also macro decision making.
Everything else but a Nazeebo, who would be called an Assassin nowadays, is basically worth only as annoying attempt to cheese opponent. Yeah, it works in Hero League, but cheese strategies are always countered by smart drafts and coordination on competetive level.
I mean, why take Azmodan over Greymane? Greymane does similar poke damage, sieges as fast or even faster, can solo mercenary camps and brings way more into team fights? I know Azmodan can be a beast when he is stacked, but it takes way too long to matter.