Gas quality could be better. Try another station. If going map 6, you can try to add a bit more boost in small increments above 5500 but I'd leave the rest alone unless you start adding some e85 etc. If you do that, bump up the FOL, otherwise there's clearly no need. Just for reference, here's my stock Alltrack on 93 with only a filter box mod and JB4. Costco 93 in Chicago burbs. My FOL is still OK here but getting high. I wouldn't worry about those minor ignition hits on your log as your overall advance looks fine. So does your FOL.
https://datazap.me/u/goodvibes/11-1...155-145-135-125?log=0&data=1-4-11-14-25-26-27
I think getting a tune or running enough E85 while raising your FOL are the best ways to maximize the is20 on an Alltrack which runs greater advance than a GTI on the factory tune but that opinion is not universal. You should be able to get more boost up top as is but there's nothing to gain below 5000 or so rpm without ethanol. JB4 is still very useful on a tune. You can cut or add boost and run logs to tweak or just monitor what's going on.