Interesting ideas, Neanikos! I just don't think you should get your hopes up too much about the devs adding new quests at this point in development... maybe for the next game?
I already suspected this, so I mainly described simple encounters that do not necessarily have to be independent quests, although the poison attack for example could be integrated into other quests. After all, I do not play the alpha, because I want to avoid spoilers*, so I don't know how far the game has progressed so far.
(*I want to send a "Thank you!" towards the alpha players, that are helping out Larian.)