Well, I'll go out on a limb here and say that the championship finals will bear no resemblance at all to Friday of the first weekend regionals.
In qualifying at early season regionals, I expect dumpers and quality payload specialists will have the edge. Towards the end of the season, however, the top tier shooters will start to get things figured out and will begin to hit "from downtown" on a pretty regular basis, shooting a much higher percentage than even the best humans.
I also expect that teams will realize that most opponents can't score if they can't get behind you, and will figure out ways to drive "in formation" so that they cover each other's flanks. A good dumper may become "wingman" (er... wingbot?) for a good shooter. We may be looking at a zero-altitude "dogfight" for many matches. If one alliance member gets their trailer mostly filled up, they may become an effective blocker to keep other bots away from empty trailers.
Or all the orbit balls will break and we'll just get together and sing happy songs.
Jason