Eh, I don't think the offense is all that bad. Certainly not any worse than the past 2 years. The shots are more than make-able. Pierce, Rondo, Terry, Lee, and Sullinger are all getting wide open looks, even 3s. Bass and Green are getting decent enough shots as well. KG is really the only one taking hard shots, and that's no different than always. Losing Ray is a difference maker, he took a LOT of shots with a hand in his face. It just didn't affect him.
Obviously everything depends on how often Rondo is going to the rim, but I can't say there are significantly less open shots than last year, we're just not making them.