I'm sure they're thinking about it but it isn't easy for them to come up with something. They can't overhaul their business plan entirely. Decisions like these could make or break the game so it's better to be patient and see what they will implement.
Should relic for example ponder on the blitzkrig mod style of abilities, there is no need to overhaul the business plan as they can just make certain abilities grayed out if you have not purchased the commander.
But there are a lot of really good suggestions provided in this thread - unfortunately I believe any changes will take ages to implement if at all, and hope it will not be too late for the die-hard fans.
EDIT: Big problem is most of the early commanders are only focusing on either KILL INFANTRY or KILL TANKS - no real balance of both.