Plan to support predicate push-down into subqueries with aggregates?

Hi all.
I was wondering if there were any plans to support predicate push-down
optimization for subqueries (and views) with aggregates?

I was recently bit by this, as I had incorrectly assumed that this was an
optimization that was in place, and designed quite a bit around that
assumption, only to get hit with terrible performance when more data got
loaded into the system.

Currently I had to solve the issue by having aggregate tables which store
the data, which is maintained by triggers on IUD. This gets messy quick,
as I have some aggregates which are dependent on 5-6 other tables. I'd
love to be able to just store the logic for calculating aggregates in a
view, and use that at query time instead of having to deal with it like
this.

I have written a test case script that explains the type of queries I am
talking about, and the issues. It's heavily simplified compared to a real
system, but it'll do. Please see attached.

Thanks,
-Adam