I know what you mean, on the other hand its less fun if the healer that dies was healing you
And i'm not so much meaning the ability of healers surviving more on the fact its hard for healers currently, even being allowed to freecast to out heal some of the damage that some specs are outputting at the moment.
I have not done any arena yet and so i am curious of others experience, but my own from battlegrounds it almost feels that you can skip entirely cc'ing a healer as you can out damage the healing they do.