Thanks! And that's a great point. The way I see it here is that it's not necessarily that Giles wants Willow to stand trial (however such a trial might look), but he's still thinking like a Watcher and can't conceive of a world where that doesn't happen after what she's done. Meanwhile, the coven have their own rules and their own methods for dealing with this, which don't necessarily jibe with how the Watchers thinks things should work...

...or something. Maybe I should just write a longer version after all.