I essentially agree with
peters; I learned a good walking route between Piccadilly and Victoria in 1973 and I still choose to walk today. Why? Mainly because it's a predictable journey. If there were a train every 10 minutes between Piccadilly and Victoria which was reliable, on some kind of regular interval, I might think about it. But there isn't and the nub of the problems this thread is discussing are why it's unreliable. Until Covid my dentist was N of the Salford-Victoria line, but it's still better to walk from Piccadilly for me - and I've had a stroke which negatively affects my walking too. 08:45 booked arrival at Piccadilly for 09:30 dentist appointment and the knowledge that it takes me a little under 30 minutes to do the walk.
I don't expect to unlearn my walking habit. Maybe newer rail users will be converted to the idea of train connections between Victoria and Piccadilly.
And I now avoid using Piccadilly platforms 13/14 if I can. On occasions I go Wilmslow-Deansgate by changing at Manchester Airport.
I'd use a through service from Wilmslow to Victoria, whichever of the two possible routes it might use. However there are relatively few of these - and none at times I want to travel.