Disclaimer: This is my opinion and may not work for you. It is offered as free advice. Take it for what it's worth.
I have to disagree with all this compression/limiting talk. By going that route, you are merely fixing the symptom and not the problem. If you have good technique, you won't need compression and if you don't have good technique, the compression will hide your shortcomings (some). However, if your compressor is squishing a dominant note, all the other notes will be squished behind that note and that's another problem.
I use ZERO compression in my rig. I use compression in the studio AFTER tracking. It is very difficult to un-compress something after it's squished. One could also argue that compression can add a lot of mud to your playing if you aren't careful (and that is your ENEMY).
I'm a Chapman stick and bass touch style player... been playing touch style for decades. Here are a few of my observations as far as ways to improve:
1. Practice. This is the thing above all. I suggest looking into some touch style technique books too. Look up Bob Culbertson and Greg Howard on Youtube. Those cats will give you something to shoot for. Stanley Jordan is also a good person to look at.
One thing that I have found is that many guitarists and bassists that employ touch style as a gimmick. They don't really pursue learning and using it to it's full potential. Rarely, they will play 2 lines, like playing a melody with the right hand and supporting it with chords on the other (more like a piano). Most of the time, it's just about " look at me".
2. Think about getting an instrument that is designed (or at least set up) to play touch style. Your regular set up can work mind you but it's not optimal for this technique.
A VERY low action is necessary to learn control and feel. Also, it is a common belief that within touch style, you should try to play faster and not harder. Use more speed to generate the note. There is NO point in hammering away at your strings.
I also suggest a VERY straight fretboard and you might have to get your p'ups very close to your strings to get what you are after.
3. Be sure to play directly behind the frets. The frets are your friend in this technique.
4. Start SLOW. Play things correctly. Be sure that you hit that note properly and sounded that note nicely.
Hopefully this will give you something to think about at least.
Be good,
Dan