Even if it's not the final one my teams that i edited on the last one we had that wasnt supposed to be released were still saved just fine with text and all so even though that site wasn't supposed to be released my work still saved fine. So i see no reason why it wouldnt now.
Its a joke, the only new stuff is the new uniforms for the schools already in the game. Other than the real school's stuff (fields, stadiums, unis) being updated, teambuilder is the same... oh except that its blue instead of green.
In the demo they touted this as the deepest and most innovative teambuilder ever when its really just the same thing as last year with just a half assed text box.