CB out of team - points tally = 9/9 discuss !
Correlation does not imply causation.
The fact is that we have changed system and tactics; if Brunt was playing instead of Morrison, we might well have achieved the same.
If literally the only difference was Brunt, I would say you have a point. But it's like the season he had a few injury problems in the Premier League. We had a better win percentage with him out the team, but the games he wasn't fit for were Sunderland, Fulham, etc, and the ones he was fit for were Chelsea, Liverpool, City, etc.
It's a stat bereft of context.