We're also rebuilding. Rielly/Gardiner/Zaitsev is 3/4 of a pretty good top-4, with hopes one of them pans out into a good #1. We'lll have to make a move for a top 4 RHD, but the idea that a rebuilding team is panicking to trade big assets for that player in a "show me" year for their top 3 offensive Prospects is ludicrous, even more so because it's coming mostly from our own fan base.
As for the OP yeah, it's bad for the Ducks, not because JvR is awful or Silf>JvR, it just doesn't nothing for them. Ducks need top-6 scoring, we have JvR, there's a definite fit there, but subtracting Silfverberg to add him gets them a better player (in my opinion, let's not freak out here) at the cost of addressing the depth, which is the whole point of a budget team acquiring a low cost #1W in the first place.
Any deal here would have to be one of your defence Prospects or Vatanen for JvR, otherwise we're ignoring the obvious fit. If Ducks fans don't want to do that, cool, but God almighty make these stupid proposals stop if that's the case.