I think you could probably add this to most tranformation ultimates that can benefit from it too. Valkyrie, Coalescence, Primal Rage, just to name a few. As well as other ultimates that lock you into something.
WHile I much prefer an instant resurrect, it would be worse than what she has now on a static cooldown. Plus, Valkyrie interacting with resurrect is not a good idea, its the reason why we got a cast time on resurrect.
They left the interaction rez had with valk where it gave 2 instant charges and so the cast time didnt matter.
Had they just removed the interaction with Valkyrie, we could have had an instant cast resurrect today, as a static 30 second cooldown is beyond fair. Especially when you have immortality field at 25 that can save multiple people, has no cast time, and many other benefits over resurrect.
Remove the valk interaction and I would be down to try it. Mind you, she would probably get around the same amount of resurrects per game, but atleast they would not be suicidl ones.