I've edited a number of posts this week, using suggested edits because I don't have 2k on SU yet. It just occurred to me that MSU might also have some posts in need of cleanup, so I came by to check. 

However, I don't see an "edit" link underneath any SU posts (except my own). 

Is it by design that only "real" editors can edit MSU posts? By design for some other reason? A bug?