I think they're pretty decent dancers, the choreography they're given is pretty rubbish though. But I don't think them being able to dance is that important - they're brilliant singers (most the time) and that, in my opinion, is the most attractive quality of them.
Looking forward to this. Although I enjoyed On Your Radar, I'd much rather have a pop album than a more dance-esque album. Ego, Up, Higher etc. all amazing songs.