What do you observe as the hardest habit to change when a tennis player starts learning how to play Pickleball?

Tennis players coming to pickleball should take a minimal backswing and embrace the finesse elements of the sport, as it is difficult to impart enough spin with the rudimentary equipment and small court size to hit the ball hard and keep it in play.
 
Transcript: "There are a ton of tennis players coming in to pickleball which is a great background sport for the game. But however, many tennis players just simply hit the ball too hard take too much of a back swing. The problems with that have to do with the generally rudimentary equipment and the tiny court. The court is only 22 feet on the other side of the net, which is pretty tough to keep the ball in play. Combine that with the fact that the pickleball doesn't bounce very high. So often, we're hitting a ball 8, 10, 15 inches off the ground, which means you have to hit up over the net. And add to that, we're playing with a generally not very sophisticated paddle, especially, compared to a tennis racket with strings, felt on the ball, and all of those things. So it's difficult to impart enough spin to hit the ball hard and have that spin keep the ball in play. So my recommendation with tennis players is to take negligible minimal back swing and really embrace the soft game or the finesse elements of the sport. Thanks for asking the question, Wendy. I'll see you on the courts."