If you navigate to a team’s Player, Roster & Transaction, Pitching, or Lineups page, and you then select any player, near the top left you’ll then get up & down arrows next to the players’ name. This enables you to quickly scroll through the players on that team. This is a simple but cool feature.
I’d like to have similar functionality to scroll through teams, and leagues. For example, if I want to take a quick look at the pitching rotations of each team in a league, it currently takes two or three mouse clicks and moving the mouse down to select each team. And if I want to look at the Standings of each of my 24 minor leagues in 1955, that’s three clicks and a mouse-pointer move per look.
The addition of the arrows for league and team navigation would allow you to easily scroll through the teams without even having to move the mouse pointer. That would be cool improvement.