I have had the TfW Manchester services have a nearly 2-hour wait at Wilmslow, which suggests that they are losing time. There also was a large number of trains waiting to use Platform 5 at Crewe on several occasions, and the amount of times I have seen blockades in the Manchester area are too high to count! :p
The blockades at Manchester Victoria I experienced were from the Victoria-Liverpool and TPE Newcastle services being sat in the same platform heading in conflicting directions, which caused a stalemate and long gaps, and Piccadilly also seemed to have issues with the through platforms causing problems (although this area is due to be updated to the most recent timetable change, I am aware).
There was also a blockade at Exeter St Davids with 2 Exmouth-Paignton/Barnstaple trains also being in the same platform heading in conflicting directions to one another again causing long blocks.
I appreciate this is a long list, but I thought I would bring up several issues at once, rather than one-then-another-one-then-another-one-etc.