First of all, I would like to say that, despite the issues that have yet to be resolved, I still enjoy your game, but there is one major factor in the game that needs to be changed.
The enemy respawn times are far too short. You don’t get around to regenerating your health as a player, because it felt like 20 seconds after the kill the opponent respawned again.
You don’t get to bag the loot because the opponent respawns in the back of the player, etc.
This factor leads to quick frustration and you have to change it as soon as possible.
Meanwhile some of us are standing around waiting for the mobs to spawn because they’ve nerfed the rate of respawns so much already we get to an area and there is nothing to kill, we stand around and wait, and wait, and eventually it spawns back in in the order it was killed in last time, and then we have to fight with all the other people waiting to get in on the kill.
Edit; Maybe you feel 20 seconds is too long to press e on a bag, but if you’re the appropriate level and geared correctly it’s not a problem at all.
I agree with the OP, respawns in many if not most areas are way way too fast. I am currently doing a side quest in Weavers Fen that has me search quests in an area with lots of ancients. I can kill the normal ancients fine, but certain mobs (archers) respawn in 30-45 seconds. By the time I clear around the the silver elite ancient who is guarding the chest I need to search a couple ancients I just killed respawn behind me and start attacking me even though I’m at least 15 yards away (aggro range is too long as well), making this quest that I am 6 level higher than inordinately difficult and frustrating.
To me this is a common experience and respawn times are too fast in most areas. Dynamic spawn rates should be implemented based on how many players are in the area. In the above example I was the only player there so there is no need to have mobs respawn so quickly.