CPU has not changed for me, still running...
2 Inputs, 2 Outputs, Wah, Amp, Mixer, Cab (2 standard IR's), Pan/Trem, Pitch, Send, Return, 2 Delays, Multi-Delay, Vol/Pan, Plex-Delay, and 3 Shunts, along with automated Tempo from Ableton LIVE, 2 Stand-In Switches, an Envelope Follower, a LFO, the Arpeggiator, 2 Gates and 2 GEQ's (via the I/O's), and a few Control Switches.
...all of this at 77% - 78% CPU on average, with 81% - 82% peak on one Scene with the Pitch Block doing smart harmony, and the FM3 is stable on all Scenes.