Yes, there are a small number of quests that we can't complete in early access, and we'll need to wait for the full game to find out what happens next!
With respect to the artist, I think he can sometimes be a bit buggy. If you save and reload, or maybe rest and come back, I think it might sort itself out? You can then send him on his way to Baldur's Gate but I believe the quest then says to find him there, which of course we can't do yet.
Same with the freed Mask from Auntie Ethel's, who says she's going to Baldur's Gate to unearth the conspiracy of hags (or something?!). I'm looking forward to finding her there and seeing how she fares - I've a horrible foreboding it won't be well - but for now we can't.
From memory, there's also the Rescue the Grand Duke, Find the Githyanki Creche, and Find the Nightsong still in your journal at the end, along with quests that would lead you to Moonrise Towers if only you could get there!