... Someone explain how to upload images, they're not displaying after i submit... and I will update below to show the data I'm explaining.

Here is a comparison of all 2018 and 2019 shows, and the # of days between the last show played. I see two things.

1. There seems to be a correlation between higher day gaps and lower ratings
2. However, It's also very common for low rated shows to occur in low day gaps, and the variances to be larger.

If you plot the same shows by date (like below) it's still inconclusive to say that the show ratings trend higher as more shows accrue in a short period of time.

An interesting analysis (but not one that can be done based on available data), would be to do the same analysis based # of mistakes made by the band during songs (instead of reviews which are too subjective). I bet you would see less mistakes as the tour went on.