I'm open to lessons, but believe you need to temper expectations.
I promised myself a proper assault on reaching single figures this year - and resolved to give up the self-analysis and get proper lessons.
The guy I found locally is well-regarded at every level of the game. We get along well and there's no communication problem.
His lessons were clear and I worked on his instructions - but hit a point after maybe 4 or 5 lessons when I could see he was more or less scratching his head.
We're looking at my swing on video, and by the time I'm at A6 he's saying "there's really no reason not to hit good shots from there...." Believe me, I was NOT hitting consistently good shots, although, even if I say so myself, it looked OK on video.
From there, and from similar experiences with other teachers, I've drawn the conclusion that there's more to ballstriking than technique, or at least the technique that can be viewed and analysed on video. I've put in enough time and effort this year to get my swing in line with what my teachers have recommended - but not so much time playing the course, practicing out of different lies, hitting into different winds, shaping the ball etc etc.
Maybe a lesson from someone who teaches with trackman, or a swingvest or similar, would open up a different perspective on what I need to work on - but those guys are a bit thin on the ground in my area.
I absolutely don't want to knock the work of teachers in general, or the guys I've worked with directly. The advice has been good - but I am coming to believe that it takes more, whether its hand-eye co-ordination, timing, talent or practice, to improve your scoring game than just to improve your swing on the practice tee.