You could only change to legacy defending in Fifa 13 when playing in be a pro and career mode offline not FUT, pro clubs or seasons, they have removed this feature from Fifa 14 sorry, hope this helps.
goto control setings scroll to the botom and switch to legacy. only works when playing against computer tho and not online
Not even if it only allows Tactical vs. Tactical and Legacy vs. Legacy?!?! What's the point here?