As a guy in beta who is somewhat churlish about what might be considered fluff or soft stuff I absolutely loved the All Star voting progression. I found myself clicking on various players to see if I agreed where they were on the list.
Visually I also love the icons on player pages. In a league with 85 years of history one of my all time great players has the badges to show it! See below.
From a nuts and bolts perspective I find AI lineup construction much improved when platooning. There is less position rotation.
In game subs and PH when simming seems better. The PH stays in the game and players are rotated to logical (next best?) defensive positions.
There is so much more.