I personally think the pros (although they are more esoteric) far outweigh the cons. You seem ready for change, ready to open a new chapter in your life. Trust me that the paperwork is temporary, as is the fear of having your degrees in your old name. This is something that happens to every person who gets married after graduating. (I also have multiple degrees and a published book in my maiden name. It hardly matters, honestly.)

That said, I would caution you against permanently changing your name due to your persona and reputation on Steemit. The real question is about how you want to see yourself and be perceived by others in all aspects of your life. If you want that last name and feel it represents the real you, with all your wonderful quirks, then it totally makes sense.