@Burned
Considering that grass elasticity has been increased over the years, .788 sounds reasonable. Don't you think?
Did you try the values I calculated? What seemed to be the most reasonable?
I've tried Shanghai and ATP Finals and this is the gist:
Due to high friction value, the ball is fast, and you can't perform shots you can perform on otherwise slower surfaces. It is so fast that you can lose points to a normal shots from the opponent more often than previously. Aces rate increased by 250% for me. Difficulty is decreased a lot against weaker opponents, and increased a lot against stronger opponents. Opponents' speed seemed to be the highest determining factor of the increase of the difficulty of the opponent.