I think the controls are really easy and after playing for a short time it's totally clear what to do when the wind is at a certain angle etc.
I wouldn't want to see it more or less complicated as it seems to be pretty realistic as it is.

The big problem I have is with race mode: It's really frustrating when enemies ram you from behind. It makes sense to punish the player for ramming other boats. But when they ram you THEY should be punished. Instead their bad behaviour sends you spinning out of control...which is terribly mean.

Perhaps a extra option that allows you to play race mode without collision is an idea. That way you can combine the excitement of playing against other boats with the possibility to sail properly instead of being forced to dodge enemy boats.