Combat is bad : bad ressource management and long cooldowns is the reason why.
Sure it might be viable endgame with best in slot but lvling it feels bad.
Runewords: give us something like insight from d2 for infinite ressources or mana per kill affix
Cooldowns : make max length around 6 sec. Then adjust or get rid of cooldown reduction stat on gear
Generator skills should’nt exist it feels bad using them