Hi CuriosTiger,
Hmmmm... Fusion 7.0.1 is working just fine on two Macs here that we've updated to 10.10.1. Could be another hardware-specific issue...
Can you try using the host's Activity Monitor to collect a "sample" of vmware-vmx? (Note that the earlier interrupt storm bug caused sample to fail... You might need to cancel it or power down your VM if sample gets stuck.)
If that doesn't work, try collecting a Spindump from within Activity Monitor.
In either case, please post the resulting sample or spindump file as an attachment.
Thanks!
--
Darius