What is your suggestion?:
As a GIM or EIM or just an iron man in general, you can't use the pools in another persons house.
My suggestion is to be able to use your partners rejuv pool if they have it built.
Is this in OSRS?:
Yes, you can use Pools in other people's houses as an iron
Has this suggestion been accepted already?:
Not that I saw, I checked before making this thread.
How would this benefit Alora?:
It would give a little bit more flexibility to groups to be able to focus their early/mid game on specific stuff to help them progress. When it comes to bossing, having someone that rushed construction and then being able to freely use a house and everything that it has in it would be nice since you're already working together. This also wouldn't take away from the donation pool either, because it does require a decently high construction level to even create and costs marble blocks which you either need to grind/buy from store.