As a regular user of TPE North between Scarborough and the NW, the overcrowding is a serious problem, and its not just confined to the rush hour, or the core Leeds Manchester section. Tinkering around the edges isnt going to solve the problem. York - Scarborough can often be standing, and at all times of the day during the summer. Its reached the point where when returning to Scarborough I try to board at Oxford Road as there have been a number of occasions over the last year where people have been left behind at Piccadilly as the train is full.
Trying to run 6 tph through the core route with mainly 3 car trains makes no sense, fewer (4tph) longer trains would result in a more robust timetable.
Back to the original thread topic, I for one will be pleased if and when we see the back of the 185's, they are not suitable for the 2 hour + journeys that they are used for. The Mk3 carriages may be old, but as a long distance traveler on this route the benefits to me even if its only a couple of trains to start with:
No doors in the middle of the carriages giving a hot/cold/hot environment at every stop
Enough toilets so that even if one is out of order there are alternatives
No engine noise
So the sooner they are in use the better. I will also be interested to see how the Mk3's cope with the track between Leeds and Manchester, parts of it give a poor ride in the 185's.
To deviate York - Leeds - Manchester needs a proper intercity service, with limited stops (remove Garforth, Crossgates, Dewsbury, Stalybridge) with intercity carriages, 6 car minimum, more if they will fit. Run 3 or 4 tph, and that leaves space for a semifast hourly service calling at the smaller stops.