@RejZoR is right. People shouldn't expect AMD to give the Vegas away at cost. AMD has been trying the approach of selling their chips for cheap in order to gain market share for a long time now and it's not working. It does absolutely no good to gain market share selling too cheap because you don't make any more profit that way. If a Vega performs at around a 1080 level then people should expect to pay close to what a 1080 would cost and if a Vega performs at around a 1080 Ti then people should expect to pay close to what a 1080 Ti would cost.
Somehow people, even AMD fans, have got it in their heads that AMD should behave like a non-profit charity. They are a business just like Nvidia and Intel and they should charge as much as the market will bear just like Nvidia and Intel and that's not greed, that's business.