A small amount of UW content is tolerable (that amount being what is already in the game). But making UW a significant part of new content? No, no, a thousand times, no!
As someone noted above this just saved me a lot of money. There are three skins that I would have happily bought if offered on their own but Anet had to go and put it behind RNG gambling. I am very disappointed. Not in the skin availablity but in Anet. Just makes me sad.