Wow! One thing that I noticed so far is how smooth the game runs with DirectX 11. Like the panning in Sulani and San Myshuno is super smooth. I used to get a little camera studder when panning, but it's just so smooth with DirectX 11! Also, it fixed the edge smoothing issue where it would drastically show seem lines when edge smoothing was enabled. I had this problem since the beginning of TS4, but it's now gone! I am impressed! Implementing DirectX 11 was an excellent idea, especially since TS4 will be getting new content for many years to come! I'm glad that TS4 will continue to exist alongside TS5.
However, I'm still hoping for the removal of that shopping cart icon! Please make the right decision EA and remove it. Us, TS4 fans will still buy all your packs for TS4! We don't need that shopping cart icon in the game.
Anyways, excellent work on this update. This is a step in the right direction.
EDIT: It worked once, and now it's crashing at launch like others are reporting.
EDIT2: Disable edge smoothing, and it will run. You will have to turn it back once the game has launched.