Rather than deal with the struggles of the past, when losing a significant portion of the performers, it was easier to end the show early. This was a good call in my opinion. I'd rather not see the quality suffer just to keep a show on life support.
With Marco Polo's Marketplace opening next year, I suspected that this would be Mix it Up's year for a replacement. It sounds as though that suspicion was incorrect. The current plan is for Mix it Up to return this season.