I believe the boat fight was meant for you to stall, not kill everyone, so the level discrepancy didn't bother me much, but it could be just alpha stuff and they plan to set them to level 9 on release.
I actually found the game even easier this patch (didn't play last patch, but AI 2.0 patch seemed harder). I tried the summoner this patch and he seems pretty useful with the incarnate doing damage, and the totems soaking abilities from enemies. I like the playstyle.
As for your comment saying the fights aren't possible without abusing glitches, AIs, or 4 teleports, it's totally untrue. Only my healer has learnt teleport, I'm going in fights without any preparation, haven't bought a single gear piece from vendors, and I haven't had any deaths all game even post Island, and i'm not even tryharding with teamcomp/spells. (altho' I played the previous patches a few times, so I have experience with the game). It all depends on playstyle and team composition. Running 4 rangers, is obviously gonna be potentially harder than with a standard tank/dps/healer comp for example.
The only fight that scared me a bit was the secret hatch under dallis' quarters on the boat. The 2 level 11 pets almost killed my healer since they have high initiative, but they didn't have enough damage to one-shot her, so it was fine.
Overall I really like this patch and the direction the game is going. All the bugs I found have already been reported so there isn't much for me to help with.