None really.
Dying at people saying "break up songs" or personal songwriting. It existed since the creation of music
Sales is not impact. Awards is not impact. Like get a grip
Taylor is one of those artists who is generally harmless. People don't really mind her because she is so PG-13, very easily digestible and inoffensive. Her songwriting is very basic and easy to understand. There's no two ways about her lyrics, they are very linear and lack any sort of depth, which makes her very easy listening and radio friendly. Unfortunately none of it is impact. Just success.