Hmmm...What speaker did you use before the Xitone, and what rig before the Kemper? I get that there can be a rabbit hole of options, but sometimes I just need to start again.
We'll i've had a lot of great moments with my Pro Jr. and upgraded to a weber speaker that raised the headroom. I've used an Egnator Rebel 30 and one of the new supro 25 watt amps for awhile too. I've never owned or played a 4X12 set up outside of a music store or studio because those setups aren't meant to be mobile... I've always liked using a dry/clean amp with decent headroom/slight breakup when cranked but not more than i'd ever use like a twin, and just adding pedals to it.
I'll have to rehearse with it more but just sitting in my house I wish I could get smoother overdrive tones. I'm really having better results with just a real 2x12 cab I have in house.