Elementalist barb. I'm just starting my first ever run with him (only hit 52) so bear with me, but there is always reason to whine about stuff, right?
1. I don't understand the logic behind Primordial Strike... Just out of curiosity: why does it always shoot to the east? Engine problems or just trying something new? I'm not complaining, I always like something new, it's just super-strong compination of forged lightning and immersion minus the mana feedback, that's targeted to east... who came up with that?

Again, not complaining as it is actually quite useful and effective.
2. Deep Freeze feels low dmg-wise. I know later when I get 4-5k str/dex and switch to sacred weapons innate bonus starts to shine but the skill itself is underwhelming, Thunderstorm does much more dmg (even to single targets at this point) and is cool. Yes I have specced mostly on lightning but I also tested cold/dex-setup. Bonus is great when you get the stats for it but skill itself is a meh.
3. Purifying Flame. Life regen is neat and it's %, but poison lenght reduced per base point? Who wants that? Poison ubers usually pierce you so much that it makes it irrelevant. IIRC poison pierce also reduces your PLR. And the life reg... 3%... 10k hp = 300hp/sec, cool but ain't that much, which leads us to the next topic:
Life Regen MO's. 15 per second is huge especially for builds that use honorifics. If you collect some money, it's easy 150 hp/sec per item, pretty much makes the game obsolete until you hit the stuff that one-shots or otherwise spikes you. For people who have played for years it's not that big of a deal as the tough game starts in around 130+, but for new players it ruins the game.