I was thinking about this the other day, and tried to figure out what exactly from Ray the team is missing.
As other posters have pointed out, it's not really showing up in the stats. It's not like this team didn't have long stretches of mediocre basketball when Ray was here (2010, 2012).
I would argue - off pure speculation - that what we miss from Ray is his professionalism. The day-in, day-out work he put into his game. Seems like this team is missing some of that.