To me, innovation and influence can be both tricky things to assess more often than not. Sometimes, both or either can be obvious, and sometimes, neither is.
In the meantime, last night's two surprise songs are both massive winners for me. Sad Beautiful Tragic is a top 10 Taylor song in my eyes, and Ours is a lovely song. She also swapped out Invisible String for The 1 in the main set, and made it clear that changes (outside of the two surprise songs slots that are different each show) will happen in the set from night to night, so that is great to see.