I like the idea of the electronic leadscrew but I would prefer it to be used in conjunction with the hand crank. The reason is that you can creep up on the cut and " feel " the tool cutting, not in the sense of feedback through the crank, but observing & listening to the process. Then the feedrate/speed can be constantly modified to suit the condititions.

My 2 cents if that this is a candidate for cutting worm gears and coarse threads with the capability to cut smaller threads if possible. It must be able to cut a very long lead to cover almost everything including decorative spindle turning. I suspect this could become unwieldy mechanically but the electronic leadscrew could cope. Another option is a IVT or CVT between the crank and a leadscrew.

I'm still looking for conclusive proof that setting the part at the helix angle still produces a correctly formed thread with the tool form not square to the thread axis. When thread grinding with large diameter wheels set at the helix angle for clearance, the wheel form is modified to suit. This suggests the tool should not be a true thread form if the part is tilted off square.