In the house there is me, DH, our shared child and two DSC (both same sex).
When we moved into this house it was a two bedroom. Me and DH had the master and two DSC shared the other room (smaller but still a double).
When I got pregnant we decided to convert the attic which we did and at the time as DSCs room had already been decorated for them, we decorated our old room for our child and we moved into the conversion once it was complete and DC was in a room of their own.
This means that of the two "other" rooms, our child has the largest. In order of size it's attic which is ours, then our DCs, then DSCs but again to stress it is still a double room with enough space for two beds (not bunks) and gaming pcs with desks for both.
DSC did stay with us 50:50 originally but now they are teens it has dropped to maybe 1 or 2 nights a week at absolute most, sometimes less if they have anything specifc on with mates. Nothing sinister, they just don't want to be moving around as much and spend most of their time now with friends which is understandable.
DH has now suggested that DSC should have the bigger of the two downstairs rooms and our child should move into the other. I disagree, mainly because it feels like DSC are rarely here enough to warrant a larger room sat empty for 80% of the week (sometimes all week) and likely to get even less as they get older. And also because our child is here full time. It's their room now (it's been years now since we moved to the conversion), all of their things are in there which due to their age are a lot bigger than DSCs, toys, more clothes here, bookshelf, toy storage etc.. and also both rooms are already decorated according to the age / style of the occupants so seems silly to redo everything for the sake of the odd night.
I think this is DH trying to make it more appealing for them to come here but I don't personally think it will make a difference. They are just getting older now and don't always want to come stay over (they still come for tea throughout the week sometimes even if they choose not to stay). They have never suggested they have a problem with the current set up.
So AIBU for saying just leave it how it is now. Or is DH BU for pushing for us to swap the rooms?