While the Star Wars rpg (and likely Genesys) is brilliant, there are several areas I wish would have been changed for Genesys.
Now, this is all personal perspective and preference, but if given the chance, here is what I would have changed:
Players roll all the dice. The GM quite literally never needs to roll. Conceivably, every enemy from orc to space fighter could set a difficulty, for attack and defence to and against. When a player attacks an enemy they roll their dice pool. When defending from an attack, the player rolls his defense in the form of a dice pool.
The reason I would like to see this, is it speeds up the game somewhat. Also, the GM is given a bit more time to focus on the story than on antagonistically rolling the dice.
Vehicle combat - in star wars, vehicles have wounds and strain just as a character does, while a ship could suffer strain and stall out, in practice it made more bookkeeping and vaguely worded abilities left it unclear whether personal or vehicle strain is applied. It was a mess. Treating ships like weapons, as a type of gear that gives you options for spending success, advantage, etc. would make for a better game.
More adversary cards - right out the gate. These simple cards helped gameplay run smoother and cut down flipping through books.