My problem with this Flashpoint is that it only gives Loot from 1 boss. Making it just a time sink. I have yet to hear anyone in my guild getting loot from anyone other then the last boss.
That being said. I beat this with only 3 people before the patch. We died 4 times. I was 24 and everyone was close to me.
Somehow I've always been able to use the chests after the bosses have died in the instance. I never use companions though, maybe it has something to do with that.
I thought it had more to do with people wiping and the encounters getting messed up as a result.