As I posted earlier in the thread, I'm a fan of the regional effort. Like it or not, Fort Worth and Dallas will forever be connected economically. I believe that if we had a regional joint bid that highlighted 4 potential locations (Dallas, Frisco/Plano, Southlake/Westlake, Fort Worth) on equal footing, that gives Fort Worth a better shot than if we had a completely separate proposal that competed head to head with something Dallas would put out there. But it's just speculation.
I have to say that I disagree with your optimism and speculation in regards to Regionalism.
With the one major exception of DFW Airport, which came about because of federal dictate, the benefits from regionalism has been markedly uneven. In a world of equal footing of corporate relocation, Dallas/Collin Co. would get Totoya, Fort Worth/Johnson Co. would get State Farm, Dallas/Collin Co. would get Liberty Mutual and Fort Worth/Johnson Co would get Amazon. In fact little if no speculation is needed. FW/J did not get even one of those corporate relocations and should an Amazon relocation to D/C happen , it would be a complete sweep in favor of D/C.
Regionalism works in a very limited area; namely transportation (airport). It has made it possible for suburbs to benefit in far greater way than if DFW did not exist.
Regionalism does not work as fairly in the economies of local jurisdictions. Instead, the competition between the several local economies within the region is fierce and self serving. I strongly recommend that you watch the video posted above; nothing is as evident in proving my point as is one city exercising its narrowly defined self interest above the other. In the cloak of regionalism, the Mayor of Dallas admits to traveling to Amazon's headquarters alone. If he mentions Fort Worth or any city in Tarrant County, it is at the first 2-3 seconds of his interview and then he proceeds talking up Dallas and its suburbs as his definition of regionalism.
Regionalism does not spread tax revenues fairly or equally. Schools in Fort Worth, and therefore taxpayers here, have not benefited from corporate appraisals and the millions of dollars that it infuses into Collin County schools; consider - where are the richest schools in the region located. I could go on; but the point must be clear by now.
A brighter more affluent future for public safety, public schools, community colleges, public hospitals, etc. is at risk here by Fort Worth taking an approach of regionalism that has been proven to be vastly uneven for itself. Amazon will change the economic landscape for whatever city it selects and concerning ourselves with ecumenical regionalism is a sure way miss the important dividends simply because you took one for the "Region".
As I have come to see far too late, DFW is not a city; it is a brand. Brands do not build roads, schools, hospitals or all the things that we in Fort Worth want and need.