I'm enjoying myself, my only complaint is that the early game is still rough. If you get unlucky with gear life gets much harder.
Also, some skills seem like they're not functioning properly. I tried detonating thunder lances with the spear leap and stacking 3 of them with barrage did like 1/2 the hp of a white mob even though it's supposed to be 3x 235% attack damage + the damage of the leap itself.
Right now on my coop character I'm running primal strikes as my main damage output, using voltaic mark and lightning Spear to proc shock. My solo character is a thorns build with shield charge and resonating shield. Both characters are doing perfectly fine. My friend running cold tornados is definitely stronger in the coop run though and the other friend running artillery ballista is also doing well.