i have, it wasn't my first idea & DH was rather resistant about it ... but I think it works best for the moment.
the reason it works is that we actually have a "spare" room ... I mean if I was doing like most people i know I would have the 2 girls in one room and the boy in the other.
they youngest was still sleeping in our bedroom actually & having each of the eldest in one room didn't work for me because they refused to pick up anything & I was mad at the mess & they would play at night instead of sleeping.
We were given another bunk bed (we had bought one already) & I decided to have both bunk bed in one room, with only my son's wardrobe (a kind of narrow tall upright pantry style piece of furniture) between them, no toys, no books in that room, they are allowed a few stuffed animals in each bed & security blankets (I crochet them or knit them, they have at least 2 each)
the room next to it has the girls tall narrow upright wardrobes, 2 tall book cases, and various other storage solutions for all the toys, and if they don't want to pick up the toys I don't vaccum nor wash the floor & close the door to not see the mess.
next step is to cull toys, DH is not on board about it and all children are very much against it ... but we cannot aford to break the wall and take over the flat next door so at some point in the future, I'm going to have to ...
Follow Mothering