The 767 will be used to cover the whole fleet.....think logically....
If an A320 with 180 seats goes tech.....why not use a larger aircraft to cover it.....would you expect the airline to sub the flight instead?!!!
As for the new colour scheme.....don't hold your breath......They have only just painted the whole of the mytravel fleet into the current scheme....
New uniforms on the other hand......keep looking around April time!!