I must admit at first I felt like imexian regarding Gp riders dropping down to T2, but then after a while I thought, perhaps not such a bad thing...
riders rarely get 1 chance to get into the Gp class but then often a bad luck season, funding issues or injury ruins there 1 season to prove they belong there, dropping back to T2 gives them a lifeline back to a competitive team and if they dominate T2 then they may get another shot at the Gp class.
Also it makes T2 that much more competitive perhaps bridging the skills gap a bit more for those that do move up.
It's also another low cost chance for wildcards to prove themselves ready to move up from the national scene, which in turn raises the game at national level etc, etc.
However for a pro who regularly finishes top 10 to drop back to T2 seems like some one just trophy hunting, not exactly hero material.