Could be the reason why some consider him a bit reckless and inconsistent. With lower sw you have less control against full speed incoming balls. His setup pretty much forces him to go for 100% every time, or else his ball wont be enough. It is very good for hitting approach winners where you have to be quick with the arm, and for topspin angles. Compare this to Novak, who can chill on the baseline forever and keep up the quality ball with 80%. But he couldnt produce good enough approach shots to defeat Carlos, as his inert setup limits him a bit in that department.