Practice at a really large speed range. Make all renditions compelling. If you feel that it's not really feasible at some speed, particularly low speed, "all the musicality" is not there. Admittedly, this scales worse with piano as a percussive instrument than with continuous-tone instruments (bowed strings, wind instruments and so on). If you work with an electronic keyboard, select some continuous patches like organ, harmonium, accordion or similar and practice a bit with that. They are lousy for practising just the right strength of attack but make sloppy release timing a lot more conspicuous than a piano. Don't overdo it in order not to mess with the main thrust of your technique but it can give some important pointers for subtle elements of expressivity that are low-hanging fruit. They can also give some incentive for improving your fingerings where you excessively rely on "finger-hopping" (an execution limiting the deliberation you can exercise with your phrasing).
Record yourself. That's as important a tool for the musician as making a source code printout is for a programmer: most of the time you don't even need to examine the result to figure out where the problem is. The mere presence of a mechanical observer is making all the difference.
And of course, listen to yourself. Swing your rendition (make first part of a beat longer than the second part). Reverse swing it. Play it with various articulations from staccato to legato. Your ultimate rendition is anchored flexibly in the middle of a large range of interpretations, with you controlling where to go every moment.
If you are bored, you are not feeling that large range and keeping to a wonderful path amidst it but are having tunnel vision on your rendition.
Try listening out particular voices and lines and their development and articulation. Are they self-consistent? Are they cohesive on their own rather than some note glued onto others and dragged along?
Once you have successfully addressed all expressive shortcomings in your sound texture and have worked out your path through the rendition, your frequency of simple playing errors will be pretty low. And more importantly, your listeners will give a shit about them because that metric just will not matter to them. It matters in recordings, yes. But when everything else fails, there are sound engineers. Of course, your errors need to be randomly distributed for that to work: you cannot afford having a certain passage have a high quota of problems: in that case you still need to work on it in particular.