I have an alternate suggestion regarding the wedding receiving line debate, and I wonder if you think it's appropriate. My sister and brother-in-law did not have a wedding receiving line. Instead of having the ushers dismiss the wedding guests after the wedding ceremony, the bride and groom dismissed the 250 guests themselves, one row at a time. It took about 30 minutes or so. Is this an acceptable wedding alternative?
What you're describing is a kind of receiving line, except the bride and groom are coming to the guests instead of the guests coming to them. Some couples actually do the receiving line in the vestibule of the church as guests file out, another variation on the same theme (although your way is a bit more orderly). The only problem is whether it would be too slow of a process for the couple to dismiss so many guests row by row. Would those in the last rows get bored or annoyed? But you actually experienced this process, and if you think it worked then it's worth considering. The most important thing is for the couple to greet each and every guest individually at least once on wedding day. Whatever works!
Wedding Ceremony Issues
Wedding Ceremony + Wedding Vow Ideas