Considering how much downtime is had these days, I doubt that a 20-30s delay, for example, will really have any consequence more than what a 15s delay already has, and for most content it's trivial to get back to where you were to achieve that. Whereas the amount of time it saves players as a whole to have the inventory expanded upon is probably a far great benefit than any individual setback that may arise.

They also really need to stop cheating us out of inventory space in other places, too. There's no reason for maps to not be stackable, nor is there any good reason to not have scrips have their total cap be not capped at all and have people spend things directly as scrips instead of turning them into tokens first. But they do... I kind of suspect it's a guilty pleasure of theirs at this point.