why the hell do you want a speperate winner per enviroment?
there have been lots of themes in the past wich were super easy to build in one enviroment and super hard on another, but you'll see sometimes the hardest one comes out as winner.
you are completely free to choose the enviroment in wich you build, so Why should the results be seperated for each enviroment?
this is the challenge of the MTC through all the yeasr the competition is being held even on TMO, TMU, TMX, and TMForever...
(my oppinion)