In regards to "they have always said that they will adapt the rules to a version that works as a PC game": I think we all are fine with that. We know that there is no actual human DM, who can do stuff on the fly. We know some rules/abilities will not really work. So no one was really suprised that the GooLock did not have it's telepathy feature at the start of EA (and still does not have anything, sadly). This is a feature that is pretty useless in a computer game. But chaning up spells like chromatic orb? That is just changing stuff for the sake of changing it.
And in regards to things like reactions, bonus action economy and things like wizards learning all the spells: I will say it again and again. We NEED a roadmap. It is pointless to argue over these things while larian is just silent on all these issues.