As you stated, rezzes are basically tied to swiftcast. It's shouldn't stop a healer from hard casting it, and those are also very engaging times for healers as an optimally hard casted rezz is like, really effin difficult to pull off. There are just so many things that can go wrong during that time, including - if you're like me - fiddle around with your own death and try to get the rezz cast bar to 85% before that big circle underneath me goes off. Ideally, peeps shouldn't be dying every 60 seconds, and if this is happening where DPS checks are tight, it's basically good night. In short, those DPS assisted rezzes are more than welcome. They are also extremely welcome in 24-man.

As others have stated, RDM's drawback is the hit they take to their MP, but also their DPS. Spells like Vercure and Verraise don't grant the RDM any mana along with not causing any damage, so it's a bit of double-whammy. I don't think the idea was for them to step on healer's toes or become this rezz god so much as they are there to assist the healers when multiple raises are needed, or when the healers are down.