Dirge is a new mold, hope they do him in Thrust colours someday 'cos unlike Breakaway that mold just screams for Thrustification.

I wouldn't worry continuity-wise, we already had 2 Mudflaps and it's possible this Armorhide is an upgraded form using a pretty sweet mold, what with the similar colour schemes.
Hope they do the old Armorhide mold as a mass release Huffer deco somewhere down the line, Botcon exclusives are a little pricey for my liking.