I don't think they have no place so much as certain aspects need reworking. Their mobility (and ability to retain much of their damage while doing so) puts many characters at an advantage. Also it's not much fun to play against imo, and based on the regularity with which I hear complaints this isn't an uncommon viewpoint. Overwatch is a very different game to HotS, so greater adaptation is needed. Heroes like Thrall and Kael'thas have shown that you can create flavour-appropriate characters without giving them the exact toolkits they had in WC3 and WoW respectively.