Do you say zee or zed?
In most contexts, zee.
It seems that Menagerie hasn't gotten any of the errata? (Supplies/Stockpile should drop "when you play this", and Destrier/Fisherman should match Peddler.) Anyways, what are the plans for Turtle/Horse/Butterfly being able to remove Durations? Add "if this isn't a Duration card...?"
For sure Supplies and Stockpile are supposed to lose "when you play this"; if they haven't online, that's just something I missed due to thinking it had already happened.
I am not sure about Destrier and Fisherman without putting work in there for this post. Maybe they could have better wordings, I can believe it.
I have not been working on Turtle / Horse / Butterfly but you are correct that they cause issues with Durations.
"Non-duration" is also looking likely for Citadel; not in the near future though, since it's not an emergency and we just had errata day dammit.
Also will Summon and Reap be reworded to match Blockade?
I don't know if they will match Blockade in whatever sense you mean that, but they may change.
Normally errata happens as the sets come out. Stef wanted to do a bunch of errata all at once. Pros: people will spot more fixes for you; you don't have the online version with a mix of certain things done and undone. Cons: you miss stuff, you aren't studying fixed images of all the cards; people complain more.
Monkey seems like a great solution to having to memorize how many cards your opponent gained. Would you prefer to do Goatherd the same way too?
Uh, well maybe. It's nice to not have the tracking on Goatherd; that wasn't a secret when Goatherd was worked on and it got the version with the tracking. But maybe there's a better version of it ala Monkey.
Why did the Guard Dog that-could-react-to-your-own-attacks not work out?
I don't actually remember, and it isn't noted in my reports. Probably it was too generous; possibly it was easy to forget because it's unusual. While there was such a version, it almost immediately changed to only working on other players' attacks.
Would you reword Guardian/Ghost Town/Night Watchman/Den of Sin to match Berserker? I think this change would have more upsides than downsides (other than the downside of needing errata)?
"To hand" is simpler in that maybe something messes the situation up, and if that means it's not in your hand that's no problem, and if it means you don't have the card to put it into play, well it used to be that that was a problem. These days however, we don't play the card if you lost it, so, aside from needing to know that, they would work with "play this." It does seem like I would have done that, and just lived with not being able to Exorcist those cards (as usual Dominion doesn't need any particular cute combo).
But, this doesn't seem like the kind of change I'd make with errata.