NGL, aquatic combat would add a huge difficulty layer to the game, and I'm all for it.

I think it would add a much needed layer of difficulty that this game desperately needs. Not gonna dive much into this, but to me, aquatic combat was very dynamic in Tri, and it diversified the combat a lot. It felt like we delved into their own territory and beat the shit out of them there too, then finally switching to ground combat, it made you feel like a mobile beast and could fight at your 100%.