I guess we have pretty much established by now that because something was in BG1+2 that does not make Larian want to force themselves to also use it if it does not make sense for them.
Its nothing revolutionary these days. And peoples would expect all kinds of additional baggage with it like custom animations, voice acting etc that requires work while it still is limiting for your storytelling as explained above.
No you're right, just because it was in the previous games does not mean it should be in #3 per default and yes, why wouldn't there be an expectation on those things? Frankly, rightly so. I would expect to have to come back during the day to a shop for example, but I would also expect to rob someone blind at night!
It's a mechanic that makes sense in an RPG environment. Plus so far the only reason given is not one for the sake of narrative, but to accomodate Multiplayer and the differences in time when certain players are in TB Combat, vs those outside of the time bubble. I understand that reasoning, but for any other reason I would be dissapointed and expressing dissapointment / discussing potential solutions or workarounds is part and parcel of reasonable forum activity.