Kas is elite because of his ability to hit step back/off the dribble 3. If he can hit it in the NBA it opens up all the other cool playmaking he can do.
I like De Larrea ok (I believe I was one of the first to bring him up in this thread), but Kas without the step back isn't quite as interesting.
Kas isn't going to create space on NBA defenders with his stepback like he did in college, imo, especially if he isn't a real threat to drive the ball. Kas will benefit from NBA pace and space, but his athleticism and ability to pressure the rim do look a bit limited. Kas might look a bit similar to Podziemski in the pros, imo.