Fists of Earth to help your healer was a minor help back in Heavensward when weakness and brink of death lowered all your stats and your max health, but today, it really doesn't help your healer. They plan out their heals based off doing the same thing for the monk as for every other DPS in the team. So you just end up contributing to them over healing if you swap over to fists of earth.

Fists of Wind, I've tested this against other movement skills. The ninja passive movement trait, at least at the time I tested it, still has them moving faster than a monk under fists of wind, and both are slower than a player under the effect of peleton or sprint. If the movement speed were more noticeable, I'd miss it. But as it currently is, the increase is barely noticeable.

I'm not going to miss them, I only have had fists of fire on my bar since the removal of Greased Lightning, and prior to that only had fire and wind on my bar because of how you'd need to dance between the two stances to build up the stacks.