Travelators etc
Ok, as an occasional user of MAN (2 - 3 times pa), I have to say that I only use it if there is no other choice. From my user experience, it is consistently unpleasant, and there is always something not working to cause inconvenience. And, given that the area is well known for rainfall, you would think that they would find a more sophisticated solution to the leaking roofs than the plastic boxes on the floor !
From NE England, on several occasions I have elected to drive to LHR rather than use MAN. Even the T1/T3/T4 experience at LHR is better than MAN, and T5 despite its faults, leaves MAN far behind.
So if you think that the non-working travelators are unimportant to the Airport's future, think again, because here's one discretionary user who is rather influenced by such things.