Looks pretty, and rather unique in its manual approach. Probably not my thing though, as I generally lean towards single player, and in sub sims I'm more interested in the big picture than the menial details (manual sonar identification and fire solutions in Sonalyst sims being a notable exception). Not sure how time compression works either, if even available, and well, again that's part of the 'big picture' that does it for me.
They don't plan on adding player-crewed Destroyers by any chance? That would be a nice throwback to the old DOS
Wolfpack. While ahead of its time, time-based hotseat multiplayer for a sub vs DD confrontation was a bit awkward. Sometimes you'd forget to switch the AI back on on one of the subs as the game handed over control to the DD player who would see a stupid sub surfacing for no good reason.