Small issues that may improve a bit of D when changed: Can you get the left arm closer to the body or make it actively to rotate you faster by actively moving the arm during the pivot to touch navel like Steve Rico does occasionally? You start the arm pull slightly before you plant. It's interesting to know if you could get little bit more D by allowing the torso to do ore of the work early in the throw and reserving more arm acceleration power for later in the hit. Don't know exactly how much it helped me but some feet at least.
Your wrist bends back some can you resist the bend harder an are you willing to do weight or Powerball work to increase wrist tendon strength? That could help if you aren't able to harness more power there by concentrating on it more.
You get a steeper angle on the disc with the wrist than I do by not getting the elbow as far forward as I do and chopping the elbow earlier than I do. The downside to your timing is that you don't get as tight an angle at the elbow as I do and get less plyometric loading and chopping power from elbow tendons. I can only theorize but currently I think that the optimum muscle power generation and tendon loading happens somewhere between your timing and mine which is trying to get the elbow as far forward as possible minus and inch or two to protect the deltoids which I hurt in cold weather. The theory against pushing the elbow absolutely forward is locking the elbow and ripping the delts apart wen the muscles and tendons get compressed too far resisting the generated power moving to the elbow chop. My elbow locked for a while until it ripped open in the chop after bulging the delts more than they are meant. That means, if I'm right, that you might get more power if you move your shoulder closer to the target by an inch or three before chopping open.
You seem taller than me so envy to the ease of wrapping the arm around the disc more for a greater wrist angle and resulting acceleration time moving the lock point around the disc rim
Not to mention the longer lever.
Edit: Can you actively open your wrist more to get it to 15 degrees or so past straight to the right for hyper spin? That too could help.
Edit2: How bout adding some double pivot work like the pivot hop step and what Dan wrote of martial arts lower body usage? I can snap and accelerate harder late in the throw this way than with x steps. If only my ankle could handle it.
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.