AE never takes risks with their designs. I don't see them changing their 2WD anytime soon unless
- they get beat at every major race by alternative designs (X-6, S2...)
- light lipo packs become race-legal and mainstream.
I don't have a clue for Tamiya and HB but they seem to like proven designs rather than innovative stuff.
VintageRacer : T5

Maybe you were refering to the TC5 (Touring car) ?