Bringing this topic back up for an update on HTML5 Yooyuball. As of this evening, Yooyuball has been updated again. I have received reports from other Neopians that:
Standard Yooyus are no longer disguised as Snow Yooyus, and actual Snow Yooyus are not invisible anymore.
Most Altador Cup team rosters are now up to date and no longer use the 2012 Altador Cup rosters (there are still a few that aren't up to date). Tulay Ada is still named Teylor Nix and Whimsi Dia is still named Elbin Kroe ingame however.
The opposing team's goalie is no longer near impossible to deal with (some people still say the opposing goalie has magnet hands, but not as bad as several days ago), so getting goals quick and easy is no longer a huge pain (just not as easily than the Flash version though).
The shift key used to reset formations no longer works unless if you press it repeatably.
There may be more quirks and updates I may have missed, let me know if you guys/gals come across more.