Quite a lot of this year's contestants (like every other year) had little else to do - Kenny, Brian, Stephanie, Letitia, Penny... In fact Matt's recent problems seem to have resulted from him having quite a lot to do, completing his EE work - in effect, he was simultaneously learning 2 dances plus a short play to performance standard in under a week. His experience probably shows is a good idea for actors especially not be be working at the same time as Strictly. The one group of people who seem to be able to carry on working at something like normal level are presenters.