You did a superb job with most of the sig shots in my opinion.
I still have a few suggestions though.
Nowitzki - F: Nowitzki B: Pierce
Dirk's default shot is way too easy to block due to having no lift and jumping forwards while in RL he jumped rather straight (with legs flailing) and had quite some lift and definitely wasn't getting blocked.
Bird - F: Boozer B: Duncan
I find it impossible to shoot with Bird. Only player I have this issue with. Plus the new form looks just as good as the old one.
next one I'm less sure about.
Kawhi - F: Jordan B: R.Allen
Kawhi stops on a dime and jumps straight up and keeps his arms straight in almost that 90-90-90° manner that is often taught. I don't remember him getting his jumper blocked in RL but it can happen ingame due to the forward jump and low release of your form. You got the follow-through from Durant's form so I guess it's subjective but I prefer the stuff I mentioned above. The Allen base is just because I want him to explode straight up, I'm not sure if there isn't a better fitting one available.
Sam Cassell's jumper is also kinda weird but I haven't found the right one yet.
I'd have some others but I'm pretty sure you'd disagree on them
Stay safe and healthy everyone!