Here's a possible solution: KICK WHOEVER AFKs FOR MORE THAN 15 MINUTES
There are tons of players who just stay there for hours doing nothing, taking up space hence blocking others from trying to log in.
And now SE limits the number of players online, everybody who's already in will be more encouraged to NOT log off even when they go to sleep because A: You don't kick them, B: If they log off they might not be able to log back in again.
So please, like ALL THE REST MMOs, kick people when they're not active for a long time!
This probably won't suffice but it will make more people able to get in at least.