What exactly is wrong with Necros?
If you like the general mechanics of the way the class plays then you should try it. Their are some perfectly fine, viable builds available for pve, dungeons, wvw, pvp, whatever you want to do. A few things need to be changed and I think most people on here know what they are. Necros are far from broken.
Here is the most recent bug list:
https://forum-en.gw2archive.eu/forum/professions/necromancer/Bug-Compilation-1/first#post1245798
I agree with what Larx said. Just be aware that ANet’s design is for us to be an attrition class, which means we generally have little burst ability.
Fixing all the bugs would fix up probably 75% of our problems.
All our skills firing off correctly and pets actually having competent AI would be two things off the bat that would make a lot less wrong with the profession.