Let me first premise by saying Witch Doctor was the first class I leveled, so it's near and dear to me! But alas, I've decided to explore other aspects of the game after hitting a wall with him. Now I haven't been back since 1.03 other than an hour or two here and there, I feel it's a bit of an uphill battle when playing him. Currently I have a Monk with a Wizard on the way.
But with 1.04 and developer blogs soon to come out, I'm hopeful that I'll have good reason to come back and visit the WD as I think it is probably the most interesting class to play. Here are some things that I'm looking forward to, and I'm looking to see what other people are hoping to see Blizzard acknowledge about this class overall.
Animations: While the witch doctor has some of the neater animations (raining toads anyone!??) they're all far too long, even with a ceremonial blade or fast 1h. In inferno I feel sometimes that while running from Fast affixes or just faster moving creatures, stopping to cast grasp/wall of zombies runs a risk of taking damage sort of defeats the purpose of casting the abilities in the first place.
Mana: At this point after playing a monk fully through inferno and a wizard into hell (I actually play and not farm Leorics manor for each difficulty). Resource management on those classes just feels so much more natural. Diablo 2 felt like resource spending game, Diablo 3 feels like resource generation game. This point has been argued so heavily that if Blizzard doesn't make some kind of change -- whether it be in skill mana adjustment or a buff elsewhere -- I'd say it's clear that they don't play WD nearly as much as Barbarian (which seems to be the most well thought-out.
Pets and summoning: For a class that has 3 passives dedicated to pets, 1 of which is unlocked at level 45, this is lacking. Where the witch doctor has so much potential in the pet department it certainly falls short. But this has been acknowledged by Blizzard during their AMA (I think, if it wasn't there it was a blue tracker). Especially considering that the promotional video for the WD in the days before release featured "foul beasts" at your disposal, it would only seem right for this to be buffed. As it is, having sacrifice and zombie dogs on your bar is close to pointless at most difficulties.
Overall build variety: The truth is that you can get through this game with pretty much any build no matter how crazy. I'm sure somewhere there's someone angling to prove that pets can work with a toad of hugeness/spider queen build and will be posting within the next few days a youtube of them soloing various champion packs. There's just simply a lack of variety and at the end of the day most people are just increasing the amount of splinters they've shot. WD may be the least played class, but he's got the best lungs -- you don't blow that many darts through 4 acts and 4 difficulties without having nice lung capacity.
These are actually pretty general things that I would imagine Blizzard will be looking at and I hope they do. The class is really fun with some really cool abilities they just seem all over the place. I would really like to start playing him again and seeing more people doing the same.
Because Barbarians were in the previous 2 games, they've had time to develop the class. Of course the other classes are very similar to other classes in the previous game, but are unique in their own way and I think they lost a bit of direction. Honestly the odd one out in the mix is the Witch Doctor, which is similar to the necro from d2.
Wizard = Sorc
DH = Amazon
Witch Doctor = Necro
Monk = Paladin
Barbarian = Barbarian.
Expect an expansion soon with 2 new class types that resemble Druids and Assassins.