I like the bitcoin days destroyed idea.
I like lots of the ideas that have been presented here, on the bitcointalk forums, etc etc etc.
It is easy to make a proposal, it is hard to wade through all of the proposals. I'm going to balance that equation by completely ignoring any proposal that isn't accompanied by code that implements the proposal (with appropriate tests).
However, I'm not the bottleneck-- you need to get the attention of the other committers and convince THEM:
a) something should be done "now-ish"
We are stuck on (a) right now, I think.