If I was to list your top 3 priorities, they would be: OD, OD, and OD.
Sure, your players might be MVP calibre now down in D4, but by D3 players 1 and 3 are liabilities on defence, and come D2 if you made it, player 2 is only scraping by.
I would echo the thoughts of the previous poster, I would recommend spending at least a season on just OD, ideally you'd want 15+ on all of them, then they'll be able to take you to where you want to be headed.
It's a shame their IS is so low, but that's okay in the lower divisions, if you maximise what they can give you in their outside game they'll make fine guards for D3 and at least be starter/backup calibre in D2.
I would always recommend forward planning for not one but two divisions ahead of where you're at (if possible), your stars in your current division should at least be good enough to be starters in the next div up, and at least good enough to be backups two divs above. Otherwise, you're wasting your time with them.
Good luck.