Guess this means we'll have to wait a little longer for a genuine initial design Sideswipe then (where we've had the real Sunstreaker since MP-12T).
It's not so much a case of having run out of ideas as it is a case of TT wanting to use the MP Sunstreaker mould more than once to spread it's R&D cost across multiple toys.
Eagerly waiting for Masterpiece Meister
I'm not surprised at the lack of black Ironhide since Ratchet was basically a repaint. Still we may yet see a Black Ironhide as something like a convention exclusive. There were lots of MP released after MP-12 for example and we saw that mold repainted later on.
Black redecos are so boring, because we get sooo many of them from TakaraTomy. As such, I think it is good that they are looking at other *coloured* Diaclone decos first.