Then disband the FC?
I'm not saying just login one day an dump everyone on the side of the street.. if your a good FC lead you'd talk to your people, bring up the problems, let them know your moving on. You'd give them some time to form a new FC for those who wanna stay together, give them access to their items and rooms so they can collect them an move them so they don't vanish into the limited time storage of death that SE has.
Locking the FC lead dosnt stop people from regrouping and reforming but it dose completely stop the RTM house flippers. Good FCs and FC leaders will not be effected by such a change and those that will or are more then likely had problems to being with.
The method they have chosen for now won't fix anything.. the RTM people will either wait out the "new member" timer or they will log those chrs out for the 45days or however long it is till the FC ownership auto changes hands.