I'm sorry I didn't get your meaning from your previous post, but I didn't. Thank you for expanding on it.
I think concelebrated Masses sometimes do reflect a failure to distribute priests fairly and efficiently.  I think it's also true that we shouldn't be assigning priests to work in the curia and chanceries doing work that does not require ordination.
In the final analysis, though, the argument for the ordination of women does not rest on the "shortage of vocations".  Women should be ordained because the failure to ordain them disfigures the church; it reduces Jesus' priesthood to what he shares with half of us (maleness) rather than what he shares with all of us (human nature).  The church cannot be whole, healthy or holy while excluding women and married men from any office or ministry in the church.