The only reason I can see for them not resolving the issue properly is because they think it will blow over anyway, and because they know forum only has a small amount of players on it.
And even then I still don’t understand why they dig in their heels so much.
Instead of the half off weaver, just let players craft weaver consuming Yvendra. Make it a recipe that only works one time if you’re scared of people getting too many weavers from their Yvendras (as if). Make it limited for a week like you are planning with the half off one.
Could someone who got two Yvendras from other than event keys craft a weaver then? Sure.
But it’s not like anyone is asking for an easy access Zuul Goth.
And who does it really hurt if someone gets weaver for Yvendra without having spent event keys?
You’ll still have hundreds of players who used up their event keys for weaver, and probably only a handful who got two Yvendras, don’t have a weaver, and will want to make the trade.
The whole thing baffles me.