Why I think this build is good:
- Non-meta
- Minimizes fuel and manpower invested in teching
- Ultra-flexible
- Strong early-mid game
What this build is bad against:
- Pumas can't really fight T-34/85s, Easy 8s, and Comets
- Vulnerable while waiting for the King Tiger
- Rather micro-intensive thing as all your vehicles are fragile
- Can't lock territory down with the Schwerer
Anyways, I thought this was worth writing about. Trying to avoid more conventional builds as much as I can.
Fuel investment doesn't seem too much of a concern to OKW. However i commend your attempt to do something different rather then the usual mindless shrek blob + panzer katze spam.
In my experience Puma-centric builds can be really fun and dynamic, however if you want to go puma heavy consider the Mobile Defense doctrine from Ostheer, the Command Panzer gives your Pumas the much needed durability, and if you stack enough Pumas your enemy is very screwed.
Pumas are great if the game is already tipped to your favour. In more desperate situation they are a liability because they lack the staying power of more heavily armed and armoured tanks.