I like these throws they show a lot of promise. The things I'd try before moving to one step throws (you could take a faster and longer step than now), two, then x step approach drive, then x step back toward the target progression is to move the right leg 4-6" toward the right of the tee for flat and mild hyzer releases and trying to accelerate with the arm a little later. When the disc has passed the right pec. Lowering the arm pull now may be a good thing in the long run but one can throw far with your pull height as well. The difference is there but it's not earth shattering.
Flat shots need running on the center line of the tee and planting each step on the center line. Anhyzer needs running from rear right to front left with the plant step hitting the ground to the left of the line you're running on. Hyzer is the mirror of that.