Hello,
I recently upgraded to Fusion 8 on my Macbook Pro (2014, non-retina). I upgraded the hardware version in my Win7 VM and also installed Intel's USB3 drivers after enabling USB3 support in the settings. I also updated VMware Tools.
I now encounter a problem where the trackpad clicks do not register at all in the virtual machine. The cursor is tracked fine - I can see Windows UI items highlighting as I hover over them, but clicking does not work.
If I downgrade the USB settings to USB2, clicking works again. Everything works fine in my Win8.1 VM too.
Is this perhaps related to the newly supported Force Touch pass-through? But my MBP doesn't have Force Touch to begin with...
However, on my desktop iMac, clicking (with an actual USB mouse though) works after the same upgrade steps (Fusion 8, USB3 in a Win7 VM).
To summarize:
Fusion 8, Win7 VM, USB3 enabled, Macbook Pro: Trackpad clicking does not work.
Fusion 8, Win7 VM, USB2 enabled, Macbook Pro: Trackpad clicking works.
Fusion 8, Win8.1 VM, USB3 enabled, Macbook Pro: Trackpad clicking works.
Fusion 8, Win7 VM, USB3 enabled, iMac: USB mouse clicking works.