But will this really be the case?
Correct me if I'm wrong (I never played 1v1 personally), but the ideal Mobile Defence game looked like this:
1) hyperaggressive light vehicle play with flamer 251(s) (and maybe a 222) to cause severe pressure early game;
2) force Allies to respond with a light vehicle of their own (AEC/Stuart/T-70);
3) immediately counter that vehicle with a call-in (panic) Puma;
4) follow up with the techless Command P4 and finish the game with the huge resource lead caused by the above.
So no, with the Command Panzer IV now requiring tech, a large part of the excellent synergy that the doctrine had is gone. Replacing Panzer Tactician with the Stuka Smoke would further tone down the synergy with the flamer 251 (or 222s).
I genuinely think that with the changes to the Command P4 the Puma should now be balanced (I've always thought that it was the Command P4 and not the Puma that was the problem). However I think the main problem is that the Puma is such a valuable unit for Ostheer (as at 5 CP it was and still would be their only reliable counter to Allied LVs) that making it readily available at 5 CP again might risk Ostheer players overpicking MobiDef again. And people seem to be annoyed by overpopular doctrines more than anything imbalanced.