@bernard I think you found the answer!! Leaving out the Db feels like it solves everything!
My wrist is very stiff (in terms of lateral movement) and when I bring my hand to this part of the keyboard, I just can’t get it in a good position. Leaving out the Gb, I was able to play the roll in one movement that sounded nice but it involved a fair amount of contortion that was pretty uncomfortable.
But by leaving out the Db, first of all, I can get all my fingers on the notes at once with no contortion, and crucially, no discomfort! So I could play that just as a block chord, which I couldn’t do when playing all five notes, and when playing the Db and leaving out the Gb, I could play it as a block chord but as I said, it was uncomfortable.
And second of all, even with the Db missing, it still sounds nice and lush, and it requires very little attention to get my fingers where they need to be. And that was after only practicing it for maybe 5 minutes.
Yay, thank you Bernard! 


