This method of thinking is somewhat paradoxical considering if you make them cost more you can increase performance. The reason why (normally) Axis tanks a better 1v1 is they cost more, but this isn't always true.
For instance IS2 > Tiger, T34/85 > Panzer IV, and so on and so forth.
Spam is cheesy as hell and really shouldn't be encouraged, it's essentially brainless. Combined arms should be encouraged, not just making a fuckload of a unit until your enemy can't handle it anymore.
Did you read the section about how spam increases micro consumption? I'm mainly an axis faction player and I've been playing this game since it was released, So i feel like even though i am not a top tier player i have something to add. One strong unit with less micro consumption is about as brainless as spamming several weaker units with higher micro consumption. I agree totally with the OP.
What exactly is the point of playing an RTS game if everybody wants to only play one faction? especially in a game like COH2 where one side has to be axis and the other side has to allies? Both factions need their own unique tools to deal with each other, I would probably quit playing this beautiful game if it turned into another boring as hell SC2 clone where all armies are just different looking versions of one another. long live asymmetrical balance.
P.S i know you catch quite a bit of flak from those goofs queen and kait and i want you to know i'm just trying to have a civil conversation.