We have done this with two interior rooms on Harmony. My wife and I in one and the kids in the other. Best thing we have done, would do this over one balcony room in a heart beat.
Pros: Two closets, more storage, kids sleep better because they had their own dedicated bed, we could sleep in while they watched TV and didn't disturb us, adult privacy , two showers so less time getting ready for events and a dedicated pooping bathroom (sorry kids!!!).
Cons: None I can think of.
Do it you won't regret it. Put all three in a room and have one for yourself