It just looks like much the same as home advantage goes.
Instead of a 4 hour plane flight it might become a 14 hour car trip from the midwest. Many forget midwest does race carpet and has been part of the series since TCS race #11.
I am a fan of a rotational Nationals between 3-4 regions.
Until the TTT land sells, don't see it as a possibility. In the survey I do like the idea of closing the TTT track 1 month before the nats and why not sealcoat it at that point. Which somewhat levels the playingfield so to speak.