Yeah it has interesting problems. I'd like to make a prototype of each idea and see which works the best. The one idea of taking 3D coordinates straight from the camera lacks a reasonable scalar. So I will put that aside for now and try some ideas using the viewport sprites.
The alignment shouldn't be too much of a problem, but when the screen scrolls all the objects might move in parallax against a sprite background that moves at a rate to match the character.
Thanks for the replies Zylann. X)
I might have to see if those devs will respond.