I would actually be really OK with the bosses having full mechanics at reduced damage. I rarely run LFR simply because its boring as all hell. It becomes what I could consider to be World of Whack-a-Mole.
The second part would clearly take work to make sure it can't be abused.
I am OK with arguments toward the difficulty of the fights, or problems with caustic attitudes and taking advantage of the raid by riding coattails to free stuff.
I am not OK with arguments that are entirely based around one group wanting to look like a beacon of badass while everyone else looks like a walking turd.