Thanks for that Chris ! I missed it too. And I just did a new Axe-Fx III video, wish I knew this before I recorded it. I searched for this parameter in AE but missed it, but sometimes I also search for my glasses while they're on my nose...For those of us who are NOT Axe Fx III wizards for the new boost to work, you have to turn the Input Boost on the Basic page first and then go to the Preamp page where the new Input Boost parameter now lives.
As someone who is relearning the Fractal System, this took me quite a bit of time to figure out. Perhaps a quick write up on how to actually use these updated parameters would be useful. Or maybe putting the Input Boost right next to the switch that controls it would make it more intuitive?