It would be nice to have smarter subquery intellisense that works like the joining intellisense that suggest matches based on column names.

E.g.
SELECT * FROM Users WHERE EXISTS (SELECT 1 FROM UserRoles WHERE Users.UserID = (**Pop up intellisense suggesting UserRoles.UserID*) UserRoles.UserID AND UserRoles.RoleID = 1)

E.g.2
E.g.
SELECT UserID, UserName, (SELECT COUNT(1) FROM UserRoles WHERE Users.UserID = (**Pop up intellisense suggesting UserRoles.UserID*) UserRoles.UserID) AS NumberOfRoles FROM Users