All I can say regarding what Topps is doing with Wackys... I remember the days when I talked about this on the previous forums about what was going in the world of sports cards. And here we are, those days have arrived in Wackys and other non-sports stuff (I assume that's the case, don't follow the whole non-sports world as much).
I would be tempted to buy a hobby collector box if each one was guaranteed to have a sketch card, but then I see that other inserts may replace sketch cards. The printing plates strike me as an "eh, whatever" chase card... especially based on one I believed somebody shared on one of the previous forms. Why should we care about a printing plate? Sketch cards are truly cool items, printing plates and "rare" parallels just draw a shrug of the shoulders from me.
But, hey, when I pulled those gold-bordered Flashbacks and people were willing to give me trades or buy them from me, I wasn't going to say no. It's not like I feel I have to keep something like that.
At any rate, the real problem I see is Topps really isn't doing what it should be doing to make the hobby collector boxes unique. Put one sketch card and one other special type of card per box and you are getting somewhere. Maybe a "buyback" of ANS cards in which Topps gets the person who painted the Wacky to autograph the ANS card or something like that to make it a unique collectible.
And I know it sucks for completists, but this is the way the hobby is turning. Don't know what else to tell you.