That would be cool. I sure hope they do a West to East coast trip for 2016, like has been rumored, but the usually pattern has been to only do full cross country trips every four years so 2016 would be one of the more centralized event years. I kick myself for not doing the full trip in 2014 but the expense and mainly I couldn't find someone who would ride in the GP with me for three weeks (2 wks MTTS and 1 wk back home) keep me from doing the trip.
I thought they did full cross country routes every year, but just alternated between East and West starting points? Sad, I didn't even recognize it... I've been to Road Atlanta 3 or 4 times for Petit and never walked the whole thing. The big hill between the vendors and paddock was tiring enough.
Rethinking about it I guess it has been a mix bag. Here is what I recall of the MTTS events: 2006: West to East Coast, GP release at Laguna Seca and Lime Rock 2008: 4 Separate Regional Events 2010: Kickoffs in 5 cities, everyone ends to Denver 2012: East to West, New York to Los Angeles 2014: West to East, San Francisco to Boston