"Are they starting to give too much support to the format?"
A commander player's appetite...IS. NEVER. SATED. (just make sure the products are reasonably priced please)
Personally, Commander is the only format for me. Standard rotates, and Modern, Pioneer, etc. all are too expensive (and are inherently competitive).
Also, I'm a green player. I see the green collection
*happy noises* so I'm satisfied.
I think they are spacing out the commander products well, and I feel like they might be trying to do something similar to Secret Lair. Players may not purchase every single commander deck, but with the extremely large amount, there will be at least one for everybody.
That's just my take on it, though.