Not sure what all the fuss is about, I've found a UI bug or two, but it's pretty much what I expected. Not as polished as it probably should be, but to be honest I'm just happy to be playing warcraft 3 again. Have only played custom games so far, but just about all of my old favourites are still there and working properly.
They will probably iron out whatever bugs there are during the course of a few patches. Granted I've heard a few people complain about (screen) lag, so maybe a lot of issues are being caused by people playing on older rigs that were more designed for the original warcraft 3. Kind of a feelsbad that they can't play the old game anymore.
All in all I'm not unhappy with what I got, I'll probably sink a lot of hours into custom games over the next few months.