It's not clear to me from the article that Love Field is primarily responsible for the shortfall. Executive Airport was recently expanded, which must have either cost money out of pocket or an increased debt load. And what exactly does "a transition to new business" mean? Is Executive being sold or something?
That said, the landing fees at Love Field seem too low and should be raised a bit, if possible. There's no reason for Dallas to subsidize Southwest or Continental, two airlines that actually make money now and again.
In the case of Red Bird, it means they are trying to run off the petty theft guys and upgrade to carjackings.
On a more serious note, they are trying to attract corporate jets from Love and Addison airports. Execs that value their lives and property aren't willing to make the move to Red Bird. (The name was changed to "Executive" to try to fool out of town decision makers). Red Bird has primarily attracted GA fliers.
In the meantime, one major corporation has moved its jets to McKinney, a good 30 miles north of downtown Dallas.
It is my recollection that there was a change of managment to reflect the local 'diversity'.