From what I've picked up above,are people saying 221's currently drive round the country with their tilt mechanisms locked out? What a waste!
Not really there are only a few limited sections where XC 221s could even use their tilt mechanisms (VT 221s do however use their tilt) and if the timetable were written to take advantage of the extra speed then those services would be restricted to 221 operation only reducing the flexibility of XCs fleet. So seeing as the tilt is not being used anyway it makes sense to disable it as it reduces maintenance and ensures there is one less thing to go wrong.