Another suggestion I assume nobody at WiS will actually read, but since I've been complaining about it on Owner Chats for a while, I may as well make it "official."
WiS should lock in any owner who takes control of a team as its world is filling. In virtually every world in which I've played more than a season, I've seen owners take over teams, only to bolt for the next shiny team in another world that crosses their field of vision. In my opinion, this isn't just an annoyance to the owners in these yo-yo-ing worlds, it certainly seems harmful to WiS itself long term, as worlds as a whole take longer to fill.
Unless you believe that owners will suddenly start waiting for just the perfect team to become available, teams and worlds will fill more quickly in succession and, over the course of time, turn over more times (cha-ching) if an owner can't leave once he's taken ownership of a team.
I don't believe most onwers will be that selective. Those who would be likely to wait on the perfect opening already are doing that. I think the issue I'm addressing is due to owners who are much more interested in playing NOW than the exact team they own. Not to mention the idea of taking the "something better" that comes along approach.
WiS, please consider locking down owner movement after taking ownership of a team.