i just rocked the tabs back and forth with a thin pliers for a while and they came away cleanly. the plastic isn't brittle enough to 'snap', but it will come away if you grip it as close to the bottom of the socket as you can and work it. any pins that get knocked about when doing this can be straightened up afterwards. not sure why a dremel on it's own would work better, sounds like you would need a vice or a drill press to do a dremel job accurately, one slip of a handheld dremel and you could mangle the pins you want to keep IMHO.
idk, whatever works for You i guess. maybe try the rocker method first, and if that leaves any stubs in the way, tidy the stumps with a dremel or a craft knife or scalpel?