I don't really care for HotS so didn't even look at that, I saw Hearthstone but don't care much for it. I've played Diablo 3 and enjoyed it, and it could be cool as an MMO game. As a mobile game, I don't really like it. It looks cheap and tacky and makes me think of those adds on Facebook and such where the character levels up and gets fancier armour. If you could play it on PC it could be alright but another attempt at micro transactions leave a sour taste. The reactions so far from Blizzard such as re-uploading the video and deleting comments is disgusting and like putting your fingers in your ears and blocking it all out.
Overwatch was pretty cool. New heroes, another cinematic, solid enough for me as a casual player. Warcraft 3 remaster is great and I will most likely get it with Battle.net Balance, but I'm concerned the Humans look too realistic compared the WoW/Warcraft 3 Humans. World of Warcraft Cinematic was nice to see for Anduin and also Malfurion not being completely shit for once. Unfortunately 8.1 release and 8.1.5 not being until 2019 kills any chance of anything exciting in the next few months. There's nothing really that builds any hype for BFA for me in the panel, with no standouts like Allied Races. I really don't like Gnomes so Mechagon/Mechagnomes are dull and I don't play Tauren heritage armour wise.
Overall I'm pretty meh. I've not been blown away honestly.