Is it as bad what it looks like? Are yo enjoying to kill them?
I feel the majority of bosses I have fought so far are just large damage sponges with little to no danger other than running out of sp potions needed to get through the large health pool. Like enemies you can keep running around them to avoid most of the danger.
This would probably work better in the feedback section though.
Yesterday we fought in a party of 4 (Sword>Peltasta, Cleric>Priest, Archer>Ranger, Wiz>Cryo) against some early quests bosses, we had fun fighting 'em in group 
They are too slow both in movement and in attacking. Ranged classes can kite around them all day. Another problem is that they are just huge health sponges, which results in people having to autoattack most of the fight due to cooldowns and MP costs. They’re not really enjoyable.
I think boses are harder than what I’ve seen in videos and I enjoy them.
I find them very boring, beating on a damage sponge for 5 minutes+ sucks alone, if a boss can’t really hurt me, I go afk and come back like 5 minutes later.
dps focussed classes and builds will have nice time with bosses. full support and tank classes however will have much harder time. although most skills are avoidable; builds that lack damage will take a much longer time to kill the boss. considering that late game bosses hits extremely hard; it’s only a matter of time before you make a mistake if you are taking a very long time to kill it.
If they can fix the god damn pets killing bosses might be a little easier on tanks and support but half the time the pets are underground or simply not attacking.
Fighting bosses that are much higher level than you is pretty fun so far, if you don’t dodge their attacks they will kill you in a hit or 2, but i think they need to attack more often instead of standing still and doing nothing for so long, and stronger summoned minions would help too.
the bosses feel REALLY spongy, but aside from that yeah I think they’re pretty fun.
They’re alright, only find it annoying because I have low mp.