Your master password was not exposed it was all encrypted information so there's no issue. I'm not changing my 32 character ASCII password as I don't believe there is any security risk. They'd still need my backup page plus phone to access the 2 factor authentication and the attempt would be intercepted in the log... nothing so far. I do have backup 32 character QR codes/passwords ready if necessary but I'm not ready to deploy them.
I got a couple of cheap used codecorp 2D barcode scanners dirt cheap off ebay.. normally $300 new they are found widely for around $20 still perfectly functional. I just scan the QR codes in to log into lastpass at home. Only keep the QR codes in wallet/safe deposit box. If wallet stolen, new QR code deployed.. so far I've never lost my wallet... along with my keys and phone they are the 3 things in life I have conditioned myself to keep track of.
The beauty of lastpass is I can make all my passwords long and nonsensical and not have to remember them. The only passwords that are not at 99% or 100% strength are sites that limit what your password can be. There are certain financial sites that ironically do this. One limits the password to 8 characters. Of course everything is going 2 factor authentication now anyways.
What annoys me are corporate rules that specify you must change your password every 3 months. With the way I have it set up, that is completely unnecessarily. With 2 factor authentication, doubly so. Luckily very few (actually zero I think) websites force this rule on you.. my workplace forces it.. I had some nice barcodes with random passwords set up but they changed the requirements to 12+ characters so I need to make new barcodes. Gonna just change the last character of the same password this time.