Yes! I could never find an answer or fix for this issue. However, I discovered that if I disconnected after logon, then immediately reconnected, the mouse was no longer stuck. Go figure.
Unfortunately, the same problem exists in Windows 10, and now the workaround doesn't help. Fortunately I found this experimental setting, which only works on the Horizon View 3.4 client:
KEY: HKCU\software\vmware, inc.\vmware vdm\client
Value: DWORD: EnableSessionDPIScaling 1
1 = on
0 = off
It does slightly reduce the resolution, but the scaling is finally correct, and most of all I can read the screen without a magnifying glass.