I, like just about everyone else, have been testing out the Necro of late and have noticed quite a few GLARING problems that blizzard somehow didn't catch.
1. No 7 piece set - Despite Blizzard overhauling a set for every class to contain 7 pieces fairly recently, they seem to have forgotten how many builds these 7 piece sets can open up to the players.
2. Terrible secondary skills - A pet, a straight firing spear, and a small nova. Not much to work with here at all.
3. Terrible skill type distribution - MOST runes are physical, which wouldn't be a big problem if there wasn't items like Nayr's Black Death(65% poison skill damage for each different poison skill used). Adding skill types to things like curses, which are all physical at the moment, has 0 impact on current usage and simply just opens up a few options for fringe playing. Some skills (LIKE DEATH NOVA! Which is a SECONDARY skill!) don't even have all three damage types represented in runes!
4. Terrible Passive Skill choices - For those of us who have tried to play around with different passives to see if anything might work a little better, you may have noticed that reading through them was depressingly pitiful. Almost no choices to be made, you can simply use the 2-3 that actually support what you're doing, and mix in any others that MAY occasionally help when you aren't paying attention. For certain builds and item choices you may not have any passive that is engaging or even helpful.
5. Primary Skill Damage - Many people have not noticed that there is only a single Necromancer set which increases the damage of your primary skills(Inarius) and the other sets simply have no provisions made for primary skill damage. This isn't a huge problem, but some people don't like using a skill that is doing virtually 0 damage just to get resource back.
6. Necromancer Set Dungeons - If you have not completed every set dungeon yet, I would suggest doing them now! They are absolutely the easiest set dungeons I've ever done. No research required for the necromancer set dungeons, just simply playing in a normal Necromancer fashion with each of the sets will guarantee completion of every set dungeon on the first try.
I'll throw this last one in, just because.
6. Ugly skeletons. Don't get me wrong here, I'd be fine with hideous, ghastly, ghoul-ish skeletons... I just think the current skeletons look fairly sad for the century we are in. The only reason I'm including this one is because the skeletons look comically bad compared to other Necromancer pets, even compared to the worst-looking of the other Necromancer pets; Skeleton Archer rune on Skeletal Mage. The skeletons have 100% pristine *shiny* 2-handed swords, the carrying of which lends a comical aspect to these delightful rejects. To compliment the swords, Necromancer skeletons also wear 100% pristine *shiny* armor from the waist up. The comical skeletons' ensemble is rounded out with a mid-calf loincloth to assure each skeleton maintains his posthumous dignity. Throw in a neck scarf and you've got the goofy regalia that would put any traditional army of the damned to shame.
...Well, it would certainly fill a traditional army of the damned with the feeling of shame to be in the same category as these lovable rejects.