These commanders are going to completely change the whole game.
Yes, I think so too. It's obvious from looking at how many new mechanics and units are packed into them. I don't think it bodes well for competitive MP balance that these 4 commanders are only available by purchasing them. At least for the CE exclusive commanders so far that some didn't have, they only had re-arrangements of existing things in the game, not entirely new ways of playing. Things that change the game balance that much should not be for sale imo. It's a slippery slope towards pay-to-win as soon as you include non-cosmetics.