For example,
- more powerful ways of searching and sorting edits,
- more powerful ways of rolling back edits
I strongly support this, but let's be careful not to lose article histories.
- Bayesian filtering of contributions
I see #3 as an interesting solution that would deal with most of our problems.
I noticed that you're in the list of Wikipedia developers. I think few people would object to such modifications. So go for it.
Regards,
Erik