While I agree that it’s the player that makes the biggest difference, different instruments are made for different users, and the Arranger keyboard has ALWAYS without EXCEPTION, been designed for the Home Hobby Player NOT the Professional Player, therefore they will always keep having features incorporated to make the home player sound great with minimal effort.
Remember a lot of Hobby players already have a day job, or are retired and want to do things they couldn’t do when they were working, consequently they do not have time to practice as a Professional would.
So if you’re waiting for features suitable for a Professional to be incorporated into an Arranger keyboard, then you will have a very, very, very long wait, as you are a miniscule part of the Arranger market.
You may not like it, but that’s the facts.
So Just Enjoy Whatever You Play

Bill