So there you have it, the math to show you're losing Big Cats while gaining the Small... That's what happens when you trade a small for a big. Is losing Irving worth picking up 5 assists per a game? You could likely replace the boards with widely available FAs like Splitter and E. Clark.
Also I expect your FG% would marginally decrease, while your FT% marginally increased. You're also losing 0.6 TOs a game.