Pearce was sacked following a disappointing Barclays Premiership campaign which saw City eventually finish 14th, and there have been problems off the field - most notably involving midfielder Joey Barton, who recently criticised Pearce´s transfer policy before being suspended following a training ground incident.
Mills told BBC Radio Five Live: "Some players may have been slightly discontented this season. Some have said their pieces in the papers and the press and they´ve felt things haven´t been going well. Ultimately that´s for a new manager to come in and put right. You need happy players. A happy camp is normally a successful camp."
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