I think its great that the bosses retain their difficulty. You get some leeway with the Echo, for a mistake here or there, but no they should not be won in a few attempts. Why take away a new players sense of accomplishment of beating that hard boss? Why diminish all the work those who originally cleared it did?

If people want to give up and stop playing or whatever because there are instant death mechanics to fights and things you actually need to think about and form a strategy for then I'm sorry MMORPGs are not for you. You should have to think and problem solve whether a mechanic is blatantly scripted or something you just need time to figure out and learn. Its part of these games and part of the challenge. Otherwise what's the point in playing?