Ultimately Manchester Victoria has way poorer connectivity options than Piccadilly, there is a reason that services have historically been concentrated at the latter station.
The only reason Manchester Victoria has received increased prominance in recent years was because it allowed the Government to claim a marginal journey time improvement without spending any money. As someone who has lived in Manchester for fifteen years, Victoria is a far inferior station and little can be done at this point to change that.
EDIT:
In my unlimited money utopia, I would probably put everything possible through a four track Castlefield corridor and close the connections between Victoria and the lines running west out of Manchester.
You referring to 'connectivity' with other trains? Interesting as not everyone who goes to Manchester, to change trains to other destinations (some do)! Manchester Victoria has good tram connections (with buses too) and also importantly closer to the shopping centre than either Oxford Road or Piccadilly. Yes Victoria as it stands is not the best station in the world but like all stations, just there to get on and off and get out of it asap. I live on the L&M line and I will not entertain the train to Manchester, as no guarantee it will not get delayed or get cancelled because it goes to through the Castlefield corridor. However, if it went to Victoria, then more chance of operating and not getting delayed either, than I would use it.
