The following is just my opinion:
1. You can add new content reworking existing abilities to maximize the area of influence of new content (from only 1 commander, to several). Did you even read my full suggestion? Because all i suggested was new content.
That is trying to balance several commander at same time, while allot of them have a broken design to begin with. I complicates the attempt and makes it harder to work. There have been 2 revamps so far and both of them have mediocre results since the solved some issues while creating others.
Imo the game would been in far better place if the focus was on the 8 commanders being revamped and result was 8 viable commanders.
Commander with design issues simply have to redesigned. (Combinations of OP abilities)
As an example imo stuka dive bombing has been overnerfed and the main reason for it was that it was available with Elephant commander and reckon planes. The ability should simply not be in that commander.
2. For what reason would would you add new content? To break more the game? New content should focus two goals, break meta and give diversity to factions (which is balance somehow).
Again the focus should be in the commander being create not used as excuse to "widen" the scope. The new commander should balanced not other commanders.
Cool story bro. That's not gonna happen anytime soon, we need to use every opportunity we have.
Again no the opportunities where used and sweeping changes where made only to find that meta is still narrow, because broken thing where created in the process.
Imo one should decide the power level for commander for each faction by using one commander as benchmark and balanced all other commander vs benchmark.
https://www.coh2.org/topic/85469/suggestions-for-new-revamp-commanders
With number of patches this game has seen if the patch was fixing one thing each time the game should be about balanced right now.