Two things I would like to see during spring training...
1-I could care less which minors were on the spring training squad last season, whether it is my next season or a new team I have taken on, clear it during rollover so it only shows the ML players and adds players I have offered a spring training invite during the new season negotiations.
2-Show player notes like on the 'edit roster' page so I know who I should make sure gets some playing time during spring training.