The majority of the quest related bugs have been fixed, but there is still plenty of problems.
PvP is incredibly unbalanced. Sorcerers can quaff a magica potion and chain teleport spells to escape from almost any fight, so can vampires, while all other classes don't have a proper escape. Nightblades for example have a 2 second long invisibility. 2 teleports or mist forms get you out of range of even the longest range skills in the game, at full magic they can chain cast it 3 or 4 times. Nightblade vanish doesn't even get you 5 feet.
Vampires themselves are overpowered, it's possible with the right skills to have their ultimate cost next to nothing (I've heard they can make it cost 6 ultimate points, while the least expensive ultimate otherwise costs 100). There is also a pvp mechanic where you steal an item from another team, and bring it to a base, but you can't ride a horse while carrying it. Unfortunately if a vampire is carrying it, using out of combat magic regen they can mist form almost indefinitely, making them go as fast as a horse while making themselves more difficult to hit thanks to the mist form.
A single vampire built right can also walk right up to a zerg, spam their ultimate, and heal themselves for more from the life drain than the zerg can do to them. Spreading out is a counter, but since ultimate is a separate resource from magic, they can then mist form away scott free.
Also every single nightblade skill in the game is bugged in some way, shape or form. Seriously, somebody compiled a
list.
All that said when you look around all the bugs and terrible balancing you can see a light at the end of the tunnel where the game will be quite enjoyable. It gives me enough hope to still play anyway, even though I end a session angry as often as not. Your friend may be the same way.