WG comments, Working Drafts, and Last Call -- clarification please?

I followed the teleconference in IRC archives. A lot of stuff.

Questions of clarification:

Do we still have discussion when it comes to publishing a Working
Draft, regardless of who publishes it?

Do we need consensus, or are all Working Drafts being published,
unless someone actively protests?

If someone publishes a Working Draft with many differences, can we
discuss each, or is it a case of all or nothing?

Is it true that the Working Group can't comment during Last Call? That
we have to raise issues before then?

If this is true, is Last Call still on schedule for October? Do we
know when in October?

Thanks for clarification

Shelley