Looking at your songs list, it seems to me that you're free to do whatever you want to is the absolute milestone in your work. It marks the end of your early amateur efforts and blasts into utter professionalism. It sounds like any of your 2018 songs. How did this giant leap forward happen?
what you might be hearing, in the recording, is more of a willingness to pursue complete vocal harmonies. Typically what happened previously, when doing a full length song, is, by the time i get the regular vocal all done and set, i have no energy left to actually deal with all the vocal harmonies. Because it is a lot of work to do vocal harmonies. but around 2015 i started recognizing the importance of following through with that, and i prioritized it much more, and developed some effecient procedures for working through this. and almost every recording since then has used a significant amount of vocal harmonies. however it should be mentioned that the writing for that song was mostly done in 2010