This is mainly why I want the feature added. Between letting everyone choose their tokens like we currently do with basic lands and having the client default to the newest version of any given token I am definitely going to vote towards players getting more options for personal expression.
Magic is a shared experience and not everything is about personal expression. Consistency and clarity in the game state are also important characteristics. Every baroque addition comes at a cost to the rest of the program.
I feel like we want the same thing here, ultimately. I just made a huge misplay recently in a game of commander because Swan Song now generates the LotR Bird token by default since the last update. It was 100% my fault for not reading the board more carefully, but at a glance I didn't see the Bird token I've been used to for over a decade and made a mistake.