I made his video awhile ago, but I had an idea on how they could implement roster editing this year. They already have the blueprint, they can basically create a new mode so it doesn't effect the current modes.
1.Use the franchise mode layout for trades, releasing players etc.
2. The player customization screen is perfect, they would have to import all of the players.
3. Saving the file would be the same as saving a franchise mode file, but you would have to play in the "roster editing" mode to play with your rosters
4. They could allow us to have the Free Agent pool
5. Allow player rotations + minutes into that mode as well
6. Obviously rating editing would be nice but I would rather that be done in the roster section rather than the edit player section
This could be huge if implemented