I think there is some confusion about who actually pays for and designs a public infrastructure project, like roads and transit lines.
You, me and other taxpayers all end up paying. Even if roads are paid out of a TIF/TDD, it's the taxes on your purchases helping foot the bill. In fact, a quarter-cent sales tax, though levied county-wide, is similar to a district-specific sales tax (TIF, TDD, etc.), so that both Prop-M-financed Cross County and TIF/TDD-financed South Hanley improvements are each paid for by sales taxes. So again, why couldn't Maplewood Commons pay for a MetroLink station? An economist would say that they're already paying for it, since also paying the same quarter-cent sales tax levied county-wide. But since potentially getting a targeted benefit back in a station, why not pay for such targeted benefit not received county-wide, out of a more district-specific source?
As for design, though largely under transit planners and engineers, you, me and our neighbors also had a hand in that too. It was residents and local businesses who wanted to limit, not expand the access to MetroLink stations. Unfortunately, while many, including most posters in this forum, value transit, there were numerous NIMBY's surrounding Cross County, from the residents south of the Clayton station to the commercial owners west of the Brentwood station, who actually feared having direct access. Would you rather Metro be a "big-brother" and just do whatever it wants to maximize transit, despite any community opposition?
But the best quote was "(THF) knows how to build roads. METRO should know how and where to build MetroLink stations." I find it interesting that a party independent of public works or a highway department, such as a commercial developer like THF, is assumed to have automatic intuition about accommodating the automobile, but a transit agency is entirely and solely responsible for rail transit's know-how. Well, evidently not, if you're complaining.
After all, just as we're all amateur traffic engineers for driving our well-known paths or amateur land use planners for living amidst development, so then we must also all be amateur transit planners, perhaps for just being pedestrians, even if such arm-chair critics have their excuses for never (or hardly ever) taking transit.