I think you're over-estimating exactly how much stuff is coming out that is just repaints and retools of old molds. Yes, there are a couple vehicles and the Mutatin' figures. But they've been retooled and repainted. And there are a lot of kids out there, that are hot on Turtles now. Some that weren't even alive when the old toys were out. Or were too young to enjoy them. So let them have their fun also.
As for focusing on more new stuff....have you seen the list of what is coming next year? As well as the pictures that have been revealed. All of the figures coming next year are new. And there are a ton of them to still be revealed according to the lists we've seen. Including some often requested figures from the new series. The only real complaint I have so far, no Baxter.
