Earlier quoted context omitted.
Hello fellow arp fiend. What I did: Go full hardware with a Squarp Pyramid or Hapax sequencer. Then stack multiple Arpeggiator effects on a channel to a MIDI synthesizer. Wire up the touch pad x/y axis to control some of the arp parameters or modulate them with an LFO. Get crazy, yo. https://squarp.net/legacy/pyramid/manual/effects/#sHqFsaX
As a bumbling occasionally drooling dilettante with exquisite ears, I wonder if I'm capable of figuring this out. Seems a hopeful route otherwise .
Can't speak for other sequencers, but Squarps have a very coherent UI and doc that make it easy to remember where the fingers go when setting things up and when actually playing notes.
Also note that I'm using your Linux excuse as an opportunity to justify my grown man toys but if we're being real you can probably achieve similar result using free software with a bit of research. Linux is a very capable music platform in theory, with kernel support for MIDI routing between apps and devices. The choice of music apps isn't too shabby either.