Im not sure if this has been improved in 7.3, but its a big problem for me in 7.2.11. I have a large project with around 65k tags, and they are spread around in around 1600 tag folders.
Trying to make changes in the designer is very slow and cumbersome for me. Just getting a folder to drop down so I can see the tags contained in it can take minutes. If I rename a folder, it can take 5 or so minutes before I can do anything in the tag browser.
Is this something I will have to live with or is their anything I can do to speed this up? This is a internal sqltag provider.