I will admit: you had me until you mentioned the Octatrack, which is a lovely instrument, but as interfaces go has always seemed just scattered with stuff, and which whilst I know many people love, I’ve met few people who loved it from the second they picked it up.
Until, of course, one learns it, and likely embraces the half one needs and abandons the half one doesn’t. I felt similarly about several hardware interfaces until I made them work for me.
It sounds right now like you’re going to just have to endure a lot of things or write a pile of software if the most important thing to you is how an object looks; I have found that “doing things in a beautiful way” is often not related to how the objects I’m using look. (Many of my favourite pianos have been a bit run down things; I used to have access to a Bosendorfer Imperial, which was lovely for certain things, and just not right for a bunch of stuff I played).
If I sound bemused: yes, I am, but I’m also interested because the design of instruments for people to play is a topic I’m really into right now, and making things that appeal to players is a huge part of that.