I know how FFXIV's interface was designed for PS3... well at least it was designed to make it playable on the PS3.
For PC users tho' the interface is far from being good. I understand it is difficult for the developers to come up with an interface that works well from both PS3 and PC but i was thinking that they don't have to.
What if they made 2 interfaces? One optimized for PC users, where you have multiple windows open at the same time. Wider action bar, additional action bars etc... and PS3 can have the current UI.
The idea is to make it an option in the settings for both interfaces. Option A would be the current one and Option B a UI optimized for PC users. Both PS3 and PC users can chose between the two options.