I play in Asia (Japan), so the situation might differ from the region where you play, but I would still like to offer a reply.
I think the balance adjustment system you're proposing is excellent and highly rational. It is undoubtedly one of the best ideas I've seen so far.
However, not just your proposal, but—without exception—almost every suggestion for balancing combat forces shares one major flaw:
The "join game" feature.
This feature allows players to join a game—and a specific team—already in progress to play alongside friends, but it is absolutely terrible.
In the region where I play, most matches force us to face multiple coordinated squads using both air and ground vehicles; within just two minutes of the match starting, the opposing team is already hovering over our HQ, crushing my teammates like bugs the instant they respawn.
No matter what kind of balance adjustment system is introduced, I can't help but think it's pointless unless the "join game" feature is completely removed or undergoes some sort of modification.
I hope your feedback encourages EA to work on reducing the number of terrible matches.
