I think it might turn out pretty interesting if her next record sounded more like her 2010-2011 (unreleased) stuff, a bit more uptempo, playful and, well, diverse. (Might also be quite beneficial for her career if she had a couple radio-friendly songs again.) I love UV, but HM just has too many songs that sound too similar, so I hope LDR5 won't be another slow, stripped-back album.
Out of the writers she has previously worked with, I'd like her to collaborate with Tim Larcombe and Blake Stranathan again. And Justin Parker, obviously, since he's responsible for some of her best songs, IMO. I also wouldn't mind Rick Nowels co-writing some songs again, but for God's sake let somebody else do the production.