YBCA

I guess my first question:

Do the players know how to do a jump stop – are they able to demonstrate a jump-stop task when asked – or do they simply fail to execute the skill properly in a live situation or against defenders?

What is the specific problem? Can they actually perform a jump stop? Can they coordinate the jump stop with the reception of the pass? Can they coordinate the jump stop with the pick up of the dribble? Can they jump stop and land in a balanced position?

Same thing with shooting:

Is the problem the footwork or the footwork with other variables? Is the problem on the catch or off the dribble? Is the problem balance on the stop, squaring to the basket on the stop or something else?

Personally, and many disagree on this idea, I would do drills that add contextual interference – that is, I would use defense in the drills or variable-type drills as opposed to standard block drills. Now, if they struggle, then I might stop a drill and use a block drill to review and then return to the original drill. I like to use passing games with no dribble. I do 2v2, 4v4, 5v5 as well as advantage games like 3v3 with 1 all-time offense or 5v5 with two all-time offense. 

Obviously, the focus is passing and cutting, but it forced players to stop on balance and use pivots to create passing lanes. 

Also, for an in-between drill, you can dribble to a defensive player who plays 1/2 defense, jump stop and make a pass to an unguarded player. This is more of a block drill, but it adds some contextual interference when stopping and passing. 

As for shooting, I'd simply start at the beginning. I move from the footwork for a basic standstill catch-and-shoot to moving straight to the basket to moving on a curve. I'd emphasize one at a time and work slowly. When working on shooting on a curl to the basket, I'd start with stationary shots and move to straight line and then to curls to reinforce the previous lessons over and over.