this is great: I can throw around ideas and someone else has to do all the work

it would be really awesome if you could implement tides into the game. It's something i have never seen done in any other game and from what I can tell the GoaT (btw: the final boss HAS to be the ghost of a GoaT <-- great idea!) environments would lend themselves well to that mechanic. Just think of all the nice little extras you could hide beneath the waves! You could link quests to specific tidal stands and could trap enemies on little reefs that get flooded...
Then again, the gain might be small should swimming and diving be implemented. Just something I'd like to see done in a game for once.
edit: Ok, nice ideas in the post below. I'll make a list with possible gameplay implementations for tides.
- hide secrets beneath the high-tides waves
- lure enemies onto reefs while the tide comes on and traps them
- passages that are only reachable at high tide (steep rocks e.g.)
- tidal pools (...?... hunting for krill and teasing sea anemones as a past time?)