New user (1 week only, but I used UDK before). At the moment my most wanted stuff are:
-option for better contract of the grid, especially in Blueprint component view. They are hard to see.
-Orthogonal views in Blue print component view. Its hard to place anything precisely in perspective view.
-Updates to UMG & its documentation.
- Inverse mouse axis control for Maya. Since UDK days, its just hard to navigate for me, & as a user of multiple 3D apps in everyday work, is the only on that use airplane controls for panning.
Overall, I am very satisfied with UE4.