These same exploits were in the past Larian titles and they aren't there by accident but almost by design.
Frankly I don't think are a big deal or particularly worse than the BG "rogue scouting" exploit to cheese fights.
I don't like to use them, I find them more tedious to put in practice than just playing normally (same as going back to camp and rest after every single fight), but hey, if some people want to go out of their way to cheese this shit, I'm not going to cry rivers over it.
I killed the goblin priestess in the exact same way xD
Conversely I just talked to her and then killed her alone in her room when she summoned me there to have a private chat.
Talk about people making life harder for themselves while trying to be clever, haha.