So you're saying it's uniform and predictable, and won't be over gained by external drive/boost pedals.
Under-gained meaning the profiles were captured at really low gain levels. Apparently the developer is into surf guitar or something.
Will that translate into an accurate higher gain context - I do not know - as profiles are 'snapshots'.
But nothing saying you can't just crank the gain knob and hit with the boost - if you like the resultant sound, great. Sounds great when Michael does that here -
Listen when he selects the JCM800 at 9:15. I don't use too much gain myself so the profiles would probably work for me - just wish that the developers would have gone for a little more of a mid-gain context for some of the gainier amps.