You're producing a very suitable tone for the purposes of what you want to convey.
On the technical front, make sure that the little figurations you're using are as even as possible and well-articulated; this will stand you in good stead both in future improvisation and if you want to play repertoire pieces. Improvisation is in my experience a very good medium to practice such control.
I haven't heard your other sessions yet, but I think I see where you going with this one.Yeah, even this isn't really my style, I can see some good LH work: that's my primary goal, to have the LH be as controlled and adept as possible in, primarily a jazz context, that is, while improvising, not just doing head arrangements or the standard accompaniment styles.Cool, man! And the title sort of fits with your ideas, you know.
Improvisation has got me this far, but I'm not sure how I would work on evenness past this point with improvisation. In a sense, maybe the idiosyncrasies which are there when it comes to the technical aspect are a result of the techniques being acquired via improvisation rather than regular practice. I've been thinking a lot about this lately.
It is like going on a journey along that brook, and finding all those shoreline features that give the brook its character. The music is fitting for the subject.
It might be a matter of selecting specific focus when you set out to improvise. Improving on technique doesn't have to be all exercises. I used improvisation to learn a number of techniques at the keyboard. You need to give yourself precise focus, and set out to work on some element of technique. Try not to abandon a technique focused improvisation if things get to awry. Work your way through it, from both a technical and musical standpoint.