The CD is fine for me, since most case if I need to quickly do some heals, a swiftcast would do the job very well.
I just hope it has a longer duration, especially its own skill animation will take 2 seconds off the 10 seconds duration, so it can only last for like 3 Cure spells, which is not a lot...also given that you can't usually stand at one spot for 10 seconds during a BOSS fight.