Also, yeah - bad choice? What? You were playing bottom table club at home, where exactly would be better time to let best players some rest? The squad Rafa picked on paper should still be serious title contender.
There hasn't been enough rotation in Chelsea's squad this season to begin with, poor Mata even on rotation duty always ends up on the pitch to chase the score. Hazard looks burned out for a while as well. Overall a lot of these lads are still relatively young and shouldn't be playing 3 times a week.
Chelsea's attack completely crumbles if Mata isn't on the pitch and the other side just sits at 40m and stays relatively tight and compact. Game becomes fest of desperate longshots from unprepared positions, pointless crosses to a dwarf, and Torres falling over every 3 minutes.