I've noticed all these issues too.
Here's a little trick I use,
On the FX1 page, boost the gain or I'm sure even amp volume can be boosted.
Then double click on the section title to lock the gain/section. Once locked, you can change patches and the section stays constant, it stays loud.
It's easy to audition this way and later you can revert to the original gain settings and tweak away
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mexico city hotel