I'm looking at this through the sage goggles. I would kill for Full Auto+Demo round burst. If you think killing a healer is hard on a Commando, try it on an operative or sage. It is truly laughable. However, all burst is relative when compared to a smash/sweep knight/warrior. The burst for the trooper/bh is all tied to grav/tracer so in that sense it sucks
Ranged dps is not supposed to be a healer hard counter and it never was. Of all 3 classes, only sniper MM is the only class capable to al least threaten healers.