I just deleted all my teams, as many of them were old tourney teams that are pre-plat and have shitty titles, so I just erased everything in my 'shoddy teams' folder, and made new ones from the ground up that are fitting to today's metagame. Not the hardest of tasks, really, if you are a decent team builder or have a friend that is one. I find teams are more fun to build (and use!) if you pick Pokemon that are ... just your favorites (but of course an all UU team in OU is never a bright idea).