Yeah, I like the idea of just maxing out 1v1 and JS this season for all 6 guys (probably I'd get rid of one, and just do five).
Then next season take the 3 best, and do OD/PA for them, and some 1v1/JS (where you include the other guys).
That will create some useful depth players for your bench and for Cup games, but also you'll start the process of training up guys who can be reasonable players in D4 and D3.
If not, then whole hog 2 position everything. pressure, passing, and JS/1v1. All the trainees are fairly decent, and pretty much interchangeable.