I apologize if this is a repeat of something someone else has said in this thread (didn't see it looking through).
What bothers me about the recent changes is not the individual difficulty of the boss changes but the level at which they spawn in Task Forces, both numerical and relative level. I have seen many times now TF missions spawn exclusively +3 and even +4 bosses (in addition to minnions and lts.) to the highest lvl character in numbers of up to 6 per group for an 8 man TF set at the default difficulty level. Worse yet is that the TFes sometimes don't spawn at this difficulty level until you are multiple missions into the TF, giving people a huge sense of lost playing time and frustration.
This behavior exaserbates the problem of the "one shot kill" in my opinion. If two bosses attack a character at the same time for 1/2 damage, 3 at 1/3, etc. it essentially still creates the problem of insta kill. Given the difficulty and number of bosses spawning it is a rarety that this does in fact NOT occur. Even tankers and scrappers can suddenly find themselves dead if 2 or more bosses attack them at the same time.
My experience with this comes specifically from the Bastion TF and the lvl 24 respec TF both of which I've seen this occur in multiple times now. The Bastion TF is esspecially bad as most of the TF is resolved to tunnel fighting around blind corners and small spaces.
I've bugged this at least once, but it would be nice for someone to acknowledge this behavior either as intended or as a bug.
