Not sure why it's a big deal, you can heal on the move today with a force embrace.

Swiftcast+Adlo was actually a thing back in Final Coil Turn 10 to solo preys. Sometimes you have to remember Swiftcast is a 60s cooldown and sitting on it forever for a death that isn't going to happen with a good group is almost wasting the skill. If you need to use it to save a life on-the-go, use Swift instead of after they die.