What do you mean specifically about the paragon boards not working?
Also, Kripparian recently made video about how he believes resists are bugged somehow, as it stands now theyre the absolute worst stat you can have on any single piece of gear at a minimum magnitude of 10. It also so happens that Intelligence (our primary scaling stat) also scales resists as well. Coupled with the severe lack of mobiility it gives a decent basis for why Necro is widely regarded as the weakest class atm.
The build diversity/viability is also extremely underwhelming. Sorcs have viable builds for each element.