@Xary : I don't know 5e well, but yes, it did seem that characters were able to do too much for what is a short turn; if it was strictly realistic according to 5e, it would be an even slower experience than that demonstrated, which was slow enough.
Given how long it took to demo not very much progress, I would assume that the 100 hour game is not supposed to level you very far. Perhaps as with BG1 the end-game will be level 5-7 or something. That would certainly be more in line with D&D TT, but might seem to be a bit underwhelming to modern video game players.