Indeed editing, splitting, merging and so on is TL4 only.
And TL4 is a manual promotion only.
So yes, a team should be promoted by admins as soon as possible. Reputation on the old site might be a criteria. Willingness also, of course. 
Indeed editing, splitting, merging and so on is TL4 only.
And TL4 is a manual promotion only.
So yes, a team should be promoted by admins as soon as possible. Reputation on the old site might be a criteria. Willingness also, of course.