First of all, I just want to say Blizzard has made an incredible work on Mercy. She`s now fair and fun to play as.
However, if we could just cancel Mercy’s rez whenever we feel like, she would be able to defend herself better, maybe escaping from death. She’s currently too vulnerable.
You can put a cooldown on it, or give it a smaller cooldown if rez is cancelled, like 10s.
Mercy needs it! Thanks. =)