I've never seen anything in writing to suggest that a tram-train from Ashburys would go north to join the Etihad line, it would be an incredibly circuitous route and more importantly would miss out the chance to serve a wider area of the East Manchester regeneration with a stop.
By contrast, this plan from several years ago does show an indicative route, via Ashton Old Road and Fairfield St.
At the same time, it may be all well and good wanting to keep the train service into the main Piccadilly platforms, but Network Rail doesn't feel the same way. Marple and Rose Hill take up four platform movements an hour between them for relatively short, local services that would be much better used for bigger and longer distance trains with more people on them. Note the often absurd train-stacking of several services into one platform, leaving only minutes apart, with no room for future growth. Moving our services down onto their own Metrolink platform, making them much more frequent, with more pleasant rolling stock and better connections and street running right into the city seems a good trade-off to free up that platform space.
I have never claimed to know the route. In fact If you scroll back you will see that I have asked the councillors if they could clarify what is being developed by TfGM. It is key to this project. I don't believe they will find a traffic free route.
The route you copied in appears to have several issues. Firstly it would require a double crossing of the Manchester to Gorton line involving both Ashburys East and West junctions. Considering the frequency of trams and the high volume of trains going towards Gorton its going to cause long waits. It then goes off towards Victoria in the direction of the Etihad and looks like going down an access ramp to get to street level. I think it will have to stop here to change electric systems. It then stops again for an unnamed new station.Crosses several road junctions with traffic lights and then presumably goes down a bus lane or even a normal traffic lane down Fairfield Street. I stand by my prediction of an increase in journey times of 5 to 10 minutes getting to Piccadilly. Forget Marple to Piccadilly in 21 minutes as the quickest scheduled train now takes.
How many millions is going to be spent on this tram project, digging roads, moving utilities, altering road layouts, building ramps etc.? Why not spend the money on electrifying the other Marple line at the same time as the upgrading the Bredbury route. Its not a great distance from Hyde to New Mills. What about the disruption to businesses and road users?
Regarding your second point about Piccadilly. I wasn't under the impression that Network Rail had the authority to dictate policy, I thought that was the role of government and devolved transport groups, elected mayors etc.
Yes I accept it is full in terms of movements during the peak, but not for long. The Northern Hub project will do 2 things that are relevant. Firstly trains from Yorkshire to the Airport will not go into the main station and will use the new platform 15 and 16, freeing up space. Secondly platforms 11and 12 which are not often used will be brought back into main usage, freeing up platforms.
There was a report on line that was written about 10 years ago which stated that there was sufficient capacity for 4 trains per hour via Bredbury and the same via Woodley. If I find it I will post it on here. We could have a metro system using heavy rail without the problems already discusses. In fact this is what transport for London is proposing for all of their rail stations. We should do the same in Greater Manchester.
I have also read on here that Piccadilly is full, rubbish. London Liverpool Street has 80 million passengers and only 1 more platform than Piccadilly with 28 million. With longer trains you could triple the throughput of the station and keep the easy interchange benefits.
I suspect that this project is shovel ready and at some point in the next year it will be announced that funding has been secured. It will then go to consultation. The time to discuss is now. When its proposed very little can be done to influence it.