Good point. This is pretty much what they did with Wheeljack -- redecoed him as Exhaust and included Wheeljack's Immobiliser and that seems to have worked well (I haven't heard of any reports of Exhaust being a shelfwarmer). But then again, they did include a toy-accurate Tracks gun with MP Road Rage, and she's massively shelfwarming. These Diaclone-based redecos seem to be hit and miss. I think it's a safer bet for TakaraTOMY to do them as limited exclusives (like Tiger Track) rather than mass store release figures. I know that the mass release figures make it much easier and cheaper for fans to get the toys, but on the other hand having these toys end up being dead stock is doing a disservice to the franchise which ultimately doesn't do us any good.
And I personally would like to see a Diaclone coloured Ironhide done as a new character rather than just, "Protect Ironhide."

They need to get Ichikawa Hirofumi back on board to write up new character bios for redecos.