Dosent FCO still have LY and DL,UA,AA among a few others have their passengers check-in @ T5 and then get bused over to T3. You land @ T3.
T5 hasnt anything but check-in desks and security and then you remain airside, so I dont understand the whole uproar over T1 @ TLV. If you arent being dropped off by a car @ FCO then you end up having to go to T3 and catch a special bus that goes only to T5. Its been like that for a few years