I totally agree HM LI was never worth doing in a pug group, even now its not worth it.
I was healing the BH Heroic the other day and not one of the other 3 players were interrupting the channeled attacks. Like EVER. I kept having to tab-target, use my own interrupt then go back to healing.
I really do not mind running this with a pug when tanking or dpsing. I can pretty much do this place with little or no effort with the team I normally go with but on occasion when they are not available and just decide to go without them, I have made it a habit before even leaving the starting area to ask if anybody has been there before or cant remember mechanics of any of the bosses (Even if they are in full rakata+ gear). You just never know.