Technically speaking, the CPU is not at 100% though. The extra % is to actually run the audio, screens, etc. I understand it may be confusing at first.You're not wrong, but isn't that strange logic? Basically if you shouldn't create above 80% it's not actually 80% - it's 100%.
If you still have 20% capacity, you should be able to go above it - seems mis-scaled, or mis-named (like Military Intelligence)
Then why can we not use DSP power to the level of e.g. 95% (I know that it is always worth having a headroom - but does it really have to be up to 20% of the processor power?). Scaling the CPU Usage is probably not the way to go - rather optimizing your algorithms so you can use more CPU power, have I right?
The patterns definitely seem to be related or limited to one or more of the following
1.05 and 1.06
installing others presets or converting from AX3
The Freidman Amp models