Meh, I don't think anymore singles should be released, they'll just perform worse. Three top 20 singles: one double Platinum (Ghost will def get to 1.2m) and 2 Silver is fine, along with a Platinum album that went #1 (it will go Platinum if/when she does the Brits).
New album next year. Not worth milking this one. UK females have a very quick burn-out rate so a new album next year should probably do well. Too long of a break won't do her any good.