Having a lot of alts on different realms makes it very difficult to keep an oversight over all lockouts. You either have to login to all realms one by one or you have to cramp all up to 50 characters you have on your account into a single list.

A dropdown menu to select the realm you would like to check for your character's lockouts on that realm would provide an easier oversight.

A possible alternative would be to have a scrollbar for your list of characters.