I'm not a professional firearms instructor. I don't make any claims to be one either. With the few folks that I've worked with I've been able to correct those particular issues from the side or by watching their target. Ball and Dummy Drills work well for that particular set of issues as well. YMMV.
There's an IDPA match at Cherokee Gun Club the first Sunday of every month. You should come out and give it a try if you haven't already. It's not the real world and it's not training but it does provide a good litmus test.
Finals for the next two weeks, would if I could.