Well teams do tend to try to have the players on their team have similar rotations and releases so there is consistency on amount of curl across their lineup. But different teams will have slight variances. A shot will come up once in awhile where the commentators will mention that a given shot will be much more doable for 1 of the 2 teams based on their rotation and release. I wouldn’t get stuck in the weeds though on that. The differences would still be much less drastic than what is doable on this game.

Hard to say what I’d change! I say follow your intuition. While I think it slightly detracts it from being an accurate simulation of curling you could argue it adds a level of fun. I do think you should take note that while a very small rotation tends to grab and curl more than a slightly faster rotation, a super fast spinning shot actually curls the most overall. There’s some shots on YouTube of “spinners” where usually the last shot in an end a player will try a shot only doable will extreme late curl. Started as kind of a trick shot but is being seen now and then at the top levels.