I actually love the high level of detail each unit is given. It's makes them larger than life which is what this game should be about. Giving personality to the characters more than they could in their own respective game world.
With the higher detail levels, you can really appreciate the character more than the other game world he/she used to be in.
The Mountain King was always one of my favorite Warcraft 3 hero units and to see him back in lots of glorious detail is awesome.
With that said though, this launch event just about has me exhausted from all the HotS alpha/beta that I've taken part of. In a way, it reminds me of why I'm against Early Access buying of games.
In this case it was free to alpha/beta test, but Early Access purchasing with your money is like your paying to bug test the game for people that will eventually buy the final version that is the way the developers intended, hopefully bug free. So while your probably already bored of the game playing it Early and having paid for it, the others are now paying for it and getting the final copy to enjoy as it was intended.
Doesn't make too much sense to me at times, but I do know some don't mind playing it alpha/beta/final without ever getting bored.