While we won't get Commanders at launch it will be an interesting addition to the game and an interesting AT once they do launch it, especially considering that it may have every specification MWM implements, at least if go by the updated chart.
What we do know is that the specific playstyle for Commanders will be centered around the number of pets and my thoughts are they are going to be either 1, 2, 4, 6 pets or 2, 4, 6, 8 pets. Having different amounts of pets is golden since not everyone likes or can actually handle that many pets simultaneously. Another big improvement seems to be that the upgrade-posers will be passives, not active ones like in CoH. That never really made sense to me since why should I, as the "master", have to do field upgrades/training and possibly having to carry around large amount of equipment to facilitate that, instead of just having that as the "base" level right after summoning the pets.
While Tannim has stated that we won't get Stalwart proportions between offense and defense I'm hoping for Gladiator/Gunner levels. I'm also hoping that we'll get at least Partisan/Bodyguard proportions between support/control and damage, thought hoping more for closer to Guardian/Operator levels. This is mainly based on that we'll get damage focused secondaries (assault guarantied with melee and ranged a possible future) and having damage focused pets with a damage focused secondary is not that great a combination imo. Not having the possibility of having differently focused primary and secondary would also "break" the basic AT setup in that the primary and secondary have different purpose.
So this then leads to what kind of builds I hope for the most, and that would be having two (maybe four) pets that run either support or control with "me" running assault/ranged (most likely focusing on defensive tertiaries). Essentially using the primary set in a "pocket healer/controller" fashion and me just going wild through the secondary. By extension this could lead to me doing all of the offensive abilities (regardless of it being damage, control, or debuffing) and the pets doing all defensive abilities and due to being able to have different specification I could have a more damage focused build for solo and perhaps a non-damage build for teams.