(2) It requires more brainstorming. i.e. To be DT1 you must be in other DT1's (99) trust list either as added or as tilded (avoid not having them at all in your trust list). I can not think of how because every time Theymos run the corn job it add and remove new members but as I said with proper brainstorming it can be improved.
As far as I know, one of the reasons the DT1-requirements don't go up as more and more users qualify, is to make it less "grandfathered" by giving newer users a chance to reach it too.
I can think of one way to improve the current system without involving theymos: check
my DT1-election ranking, and scroll down to users who almost qualify. See if they
have good trust ratings and good trust lists, and add them to your Trust list.