It's a compromise that does neither OT nor PT fans any favors. Instead of getting an "ultimate" R2 since we're paying "ultimate" pricing, we're getting a handful of gimmicks and it seems to be ensuring that we won't be seeing all the stuff we should be getting in either realm. With this thinking, why not just make all Vaders into 1 figure, with ANH vest robes and ROTS limiting shoulder armor? Why not just make 1 Han Solo figure for the entire saga, so what if he has a different outfit in each movie and looks different as he ages - close enough, right? It's lame and a bad precedent. It's also surprising given the amount of sheer accuracy they put into the Sandtrooper - why show your commitment to such deep collector quality in one figure and then stumble on another? It's not like R2's a large figure or a complex figure or even heavily articulated, so is it a cash grab, is it just budgetitis, is it a lack of vision?
The OT still gets three accessories in the periscope, lightsaber, and scanner, plus the saga-spanning arm, so is it really that much of a travesty that they threw us PT fans a bone? It's not like they're these huge, giant accessories - I doubt the drink tray could have been included instead of these; that's a much bigger piece. I don't remember Hasbro saying the waves would be 75% OT to 25% PT - the USA Today article only says the line would "primarily" be OT, and that's not even a direct Derryl quote. You said it yourself that the booster rockets are the only PT accessories, so it's not like the OT's being ignored here or anything.