Jeggz
Inspired
I’ll give it a whirl on Saturday.Specifically for the Dynamic Presence and Depth thing, there used to be advanced parameters called Dynamic Presence and Dynamic Depth. Basically, the harder you played the more the amp would turn up the presence (which simulates how some real amps act sometimes) and the same for depth (except no real amp does that, it was just there for fun). But the new algorithms have removed those options entirely. That means if you'd made heavy use of those options to create your tone (as I suspect Tone Ranger did) then you'd head something very different with them suddenly gone. But they aren't on by default, so if you didn't go in and explicitly set them you don't need to worry.
3.1 also has improved bias grid clipping algorithms which improved the sound too.
Unless of course......