Folks in random crapola could manage in the old hm flashpoints. The new 55 fps? If you didn't have raid level, above rakata gear going into 2.0 and you're trying to get it now you are going to have a rough time. Particularly if you are a tank or a healer.
Which is a total joke considering how easy it is to campaign/bh/hazmat gear now. People go do a few hm 50 flashpoints and/or HM/NIM EV or KP. My seldom used Alt infiltration shadow did one run of NIM EV and went from BH/Campaign to almost full Hazmat in one run.