I do not seem to have any problems with killing Raid bosses, looked at my history, mix of P1 and P2 spawns and all dying, though if i was to complain (Which i am not) still spawning alot of lvl 50-70 event raid bosses and not enough P2 bosses, still getting a few snow beetles and they do have 3 million or more hp, some allies are doing 1.5 mil hits, so all good for me so far. Hitting for 300k-1,000k myself, but yea, i am noticing people have stopped poking them now and really letting hitting for full strength now.
Will easily get the equipment, but the rest not sure, early days so we will see how it goes, last time i left it a bit late and noticed people not really interested towards end of the event. ie some bosses did not die, guessing people finished early.
Overall enjoying these Raid boss events, do find it anoying having to check game every 60-90 mins, but since some one on another showed us how to play on mobile device, soooo much easier now, and more subtle, can play infront of people without my scantly clad Wufu splashed all over my desktop screen for all to see.