I'm fairly disappointed by the warlock for now: He plays like a mage that casts a few spells and then is out of spell charges, so he has to start fighting with a normal weapon or spam some basic repeatable spell.
So it feels like being able to do something enjoable for a short time (when he casts his strong spells) and then he becomes boring to play. I also have the impression that he has less spell charges than the mage despite refreshing his during short rest. I haven't counted it, but it feels like it.
I expected to see more spells that are related to my chosen patron, but I don't see many of them so far and the game does seem to grant me some skills that could be related to the other patron.
And most important: Were is the relationship with my patron? Only once I could use a power from him which was a reaction to a sense of being observed. I would like to meet him, talk with him and develop an actual relationship. I mean of course we have a devil appearing later in the story and thats nice, but I hope it's not a replacement for having actual relationships with the patrons. No devil can replace the relationship with my archfey.