1- I do not think CO would ever hub again at DIA unless there was a CO/UA merger. Is there even enough space at DIA for CO to have hub operations? As it stands DIA is already a hub for Frontier and United.

2- I would most certainly fly CO into DIA as I already do.

3- Yes and No. For anyone on the western coast, I fell that DIA is too far out of the way to go on to connecting cities within the western area. For anyone north, south, or east of DIA, DIA would be an ok connecting point for those traveling to the west. Also, if you are on the western coast and connecting to places east of DIA, then DIA would be an OK connecting airport.