Let me make sure I'm understanding you. Are you saying for every player you want to select a different projection source if you like it more? I'm not sure but it really sounds like anything we'd implement would look a lot like a spreadsheet. If you organize your spreadsheets by name, they should more-or-less line up, then pick the column that you agree with the most. You can export our projections to a spreadsheet with the "copy data" button at the bottom, if you paste it into a spreadsheet.
I don't know how much better of a process we can implement that won't make the site look overly complex. Do you have an idea of how it would look and how it would work?