RE: most of Peter Todd's comments:

All of that should be separate pull requests.  Big Honking Pull Requests
are harder to review and are more likely to be bike-shedded to death.


RE: not relaying/mining transactions with OP_NOPs so miners don't mine
up-version transactions that are invalid under future-new-rules: I'm not
convinced it is worth adding more code (more potential for bugs) to protect
against something that isn't going to happen because up-version
transactions are non-standard (due to version check) in any case.

In any case, lets make that a separate pull request.

I'm going to take the lack of immediate "That's a Terrible Idea!" as rough
consensus...

-- 
--
Gavin Andresen
Chief Scientist, Bitcoin Foundation
https://www.bitcoinfoundation.org/