Some things I'd live to see if possible would be:
More guernseys templates would be nice. Maybe all real club guernseys as templates if possible? Just remove the sponsors if you have too.
An option to press a button and get randomly generated players for created teams. It's to hard to try and fill out 9 created state league level clubs because of real club list numbers.
Custom leagues where you can pick how many teams, number of rounds, and finals system.