There are gazillion threads on the subject. 
but I was just looking for opinions on knee rolls. I have a saddle with a decent sized knee roll - but it is very squishy and I often end up directly on it, especially when I bring my lower leg back.
If you had the same exact saddle without the pad, your position wouldn’t be better. Your knee shouldn’t crawl up or forward when you move your lower leg.
On saddles with big, hard knee rolls, I really struggle with keeping my toes forward and I brace a lot on the knee rolls. My favorite saddles are the really old dressage saddles with nonexistent teeny tiny knee rolls.
You know, you can buy new saddles with minimal pass/blocks. “Old” saddles aren’t majikà ly better.
It won’t prevent you from struggling to keep your toes forward or bracing with your knees. That has nothing to do with the saddle itself IF it fits you and your horse right.
I was just wondering if anyone else has this experience, what it means, and how you combat it?
Find a saddle that fits both you and your horse. You shouldn’t fight for your position.
That doesn’t mean your position will be better with a flat saddle.
Netg :
they aren’t supposed to lock you in place but too frequently do.
And that’s because people don’t try/buy saddle that fits them or their horse.