You can always do an "Adam Breakey" and go to (don't recall the exact number) 20, 30 Evo schools in one year.
The hardest part of autox is not getting the seat time in the right quantities coupled with the proper feedback as you've mentioned. Using an entire Sunday for ~4 minutes of seat time a couple of times per month will consume a lot of time trying to focus on skill development, so imo just attending typical events is not a real efficient method to rapidly improve skills/work on issues/etc. Hence, just have fun! Of course sometimes letting go of a need to achieve something will bring out the best performance in oneself anyway...funny how that works in so many areas.
Truly excelling in autox takes a weird combination of skill too -- (1) pure driving talent and all that entails *plus* (2) the ability to see/read a new course and
very quickly being able to perform at a high level on that combination of turns/slaloms/elements (i.e. maybe only 3 runs to try to post the fastest time). The #2 part might actually be the more difficult to master in some ways. Many times you could have different winners if we did 20 runs on the same course versus 3 runs, but it's the ability to combine both 1 & 2 that is mandatory to truly excel at autox. Most autox schools focus heavily on #1 with some attention (but not nearly enough imo) on #2.
As far as having fun on course goes, that's always been my "problem" in autox. I'd rather go out and have an absolute blast driving a course than necessarily posting the best time I could. That's not how I think about it, nor my expected goal ahead of time, but instead is a statement of how I actually behave once course.

Sometimes there are "just those elements" that suck me into truly enjoying the experience which can and does result in giving up time (overcooking) the following elements. Sanford used to be like that for me -- those alternating sealed blacktop sections on the main runway and how transitioning onto them resulted in wonderful power oversteer practice/fun at the expense of some time on course.
It's too bad VIR doesn't have a nice autox setup (like Beaverun used to, not sure if new owners still do) that is open every Saturday for practice. It would be wonderful to have some facility like that which would allow a Saturday of say 30 runs. I really enjoy going to the BMW CCA autox events at the Performance Center track since the course is usually 1:30ish long, there is no course working necessary (they have that covered, a cone hit is a DNF too), and I usually get 6 runs before lunch and then 9 runs afterwards. In that environment I find I can actually get enough runs/time to work on technique and get useful repetition/feedback.