I'm running Workstation 11 on Windows 8.1. I've found that in ANY guest OS (Windows 10, Fedora 14, and 21, Ubuntu, etc..) that the mouse will go straight to the upper left corner of the window once it's captured, making it unusable. I've updated VMware tools and re-installed them, no change. I've tried Grabbing the input, changing it to auto-grab/ungrab, etc.. and none of it helps. Anyone have any ideas??
Found my answer! Not sure how I missed this in my initial search, but: Mouse problem on second display using WS 10 (regression?)
You'll see that the Changing the compatibility settings for VMWare workstation executible to disable DPI scaling resolves this issue. Hopefully this helps someone else out there.