Shut Down the Teambuilder site until it's REALLY finished.

i dunno.... i'm about to start charging for team submission and design cause i have no issues getting stuff up other than a website that's just slow on response... once you figure out the foibles of the site getting stuff str8 is more on annoying and def less impossible than it was at first launch

The site is slow but not unusable. 

You can't edit player names on the site, but you can do so in game.  You can edit their appearance, number and attributes on the site.  You can also preview the uniforms either as a whole or individual pieces.

I'm not sure why you're having so many issues with the site, but maybe try a different browser?  I know some people had issues using chrome.  Personally I use Firefox with zero issues.

Wishing you the best of luck.

Firefox, 8gb ram and a SSD hard drive on a 10 year old computer with wifi connection... no issues other than the lag of the site...

Perhaps we all have dissimilar definitions of the term "useable". IF only certain people with certain systems can run the site, if I've done all the things suggested by others who claim to have had success to no avail, if the DAMN THING DOESNT WORK at least a Majority of the time on the Majority of systems, then it's not working properly.