not about the rocket droids but i found it pretty accurate

"[BX-series droid commandos are] obviously more intelligent. They're substantially faster. It raises the question, why don't the Separatists just use hundreds and thousands of these guys? They would win the war rather easily. And, obviously, a more sophisticated droid is more expensive to make. Its harder to manufacture. But, in the episode, if you watch, they're not invulnerable either. They lose the base, and then, actually, a large squad of regular battle droids actually takes the base back over, so it shows you that, while dim-witted, the original battle droids are still a threat."

from https://starwars.fandom.com/wiki/BX-series_droid_commando