I believe that the problem will be with doors, tight locations and dungeons. I was using scorpion qween as pet for some time - and i would say that it wasn’t the best experience. Espesialy at Black Tower - at start she had problems to get into some places, was blocking way and in the end she bugged soewhere under dungeon.
So in the end i was suposed to fight Tyros 1v1 with authority build. Ouch.
Yeah i see how that could be a problem but usually some of the creatures limbs kinda swoosh through the wall anyways and usually recalling your companion and kinda just running a bit further does spawn them