I think that the "concept" of the "territorial parish" is so very very good, and IMO, it's too bad that we have become "global" and therefore feel no loyalty to our territorial parish.
A territorial parish is a "neighborhood" of people who all live fairly close to each other geographically, or at least live in the same section of the city with the same type of incomes, architectures, crime rates, etc.
In the past, when people weren't "global," and most people stayed home most of the time (even their children played ball in the vacant lot, not at a "park district sports core"), the neighbors in each neighborhood got to know each other, and did things together--school, shopping at the grocery store, recreation, block parties, home parties, talking over the back fence (if there was a fence), getting the kids together to play, fixing up the homes of shut-ins in their neighborhood, etc.
I remember these times, and they were really good times. I mourn the passing of the "neighborhoods."
I think the "global" mindset has hurt the Catholic Church, and I think that those who eschew their territorial parish need to carefully and prayerfully consider the possibility that they might be practicing a kind of religion commonly seen in evangelical Protestantism, in which the focus is on "me, myself, and I", or actually, on "my family," which makes it sound more spiritual.
In this kind of "personal" religion, people go to church "to be fed," not to be part of a community of fellow Christians and to get involved with serving them and all serving Christ together.
They do not easily "submit" to any authority other than self, and they find ways to get out of obeying church authority; e.g., "that doesn't meet my needs," or for many Protestants, "I interpret the Bible differently."
Among Catholics, what I've seen is that people say things like, "my territorial parish is so liberal," or "there are no young families (or whatever demographic group you belong to) at my territorial parish," or the biggie that I see on CAF: "my territorial parish priests allow so many liturgical abuses in the Mass."
Ah,well, I'm just a fuddie duddie, I guess, and those romantic times when every Catholic in the neighborhood attended the same parish are gone with the wind.
My husband and I attend our territorial parish, which is down the block from our house.