I have never used the cap forums before :S
Has it ever been considered that we could create Items that extend the length of Trickroom, Gravity and Tailwind similar to Damp rock. This could potentially make Trick room viable and it would be interesting to see a metagame where teams have to prepare for Trickroom.
Secondly, I would really like to see a pokemon with the ability to cast permanent gravity. Permanent Trickroom/Tailwind would most likely be broken, but permanent Gravity could have some interesting uses for both stall and offensive teams (Spikes/Innacurate moves). It would also most likely increase the useage of Bug and Grass type pokemon which are currently unpopular.
I'm more wondering if these options have been considered and would testing things like new abilities and new items be an option, not just new pokemon.