Healing Chant / Earthquake: Currently they're a fixed location, if you are moved while channeling (knockback, on a boat / hulk etc) then the aoe location remains disjointed from your character.

With the warhulk change, they're now prevelant at land towers and sea towers are always active.

I think this would be a very easy thing to fix with having the AoE bound to your character location, not the initial cast location, so you can have mobile healing stations on boats and hulks.