Hm I don't like to be the first reply on a suggestion, because somehow the first post always get something to talk about... ><
I consider that instead of making a wing that does the same as a rucksack why not make a wing that actually do something more than add walk speed but not give it the same effects as rucksack, since I consider that the wings would take rucksacks out of the market easily, I mean I like wings instead of a Rucksack more, they "this is my opinion" looks better, but I'm tied to the rucksacks because of the effects and buffs they give, and I think that it is not just me who thinks like that.
For that reason I won't +1 the main idea of this suggestion, but also I don't think that -1 would be a good idea either, since we could come up with some other buffs for the wings... Will leave this to discussion.