Do keep in mind the majority of CoH2 players are casual 4v4 players and limiting heavies to only 1 DRASTICALLY changes the way that format plays. While the more competitive players might be able to easily transition to a lot of new changes(especially those in the alpha of actually played with them), do remember the majority of CoH2 players haven't played with the changes at all.
Believe me, the incoming changes are severe enough, that if relic doesn't plan on implementing them for the next 2 years, it WILL be a huge shock to the players and limiting heavies is rather a minor inconvenience in comparison to what is to come.