I mean, that's certainly possible, but what would stop Ostheer from going right back into the Puma meta and call them in every single match? I personally agree that it was the techless AI tank follow up that was a bigger problem than the Puma, but reverting the Puma changes now would still risk seeing MobiDef almost every game again because it was simply Ostheer's most effective way of dealing with Allied lights. And seeing the same doctrine over and over wasn't fun at all. The Puma was Ostheer's Command Panther and everyone was sick of it too back then.
I agree: the Puma's position isn't ideal but there also isn't really anywhere else to put it. The synergy with 30 FU anti-infantry light vehicles is just too much.
However, I am concerned that the changes to the Command Tank will kill off the Puma's last role: working with the Command Tank to skip T3.
Have you considered locking the Command Tank behind Battle Phase 2 instead? That prevents it from being used as a techless call-in, but still allows it to be used to go straight for T4.
Alternatively, you could return it to CP5 and paint 'Command Puma' on the turret. Limiting it to one allows it to be countered with superior numbers.