The Vega FE is a bit of a let down to me but all is not lost. At the moment you can't overclock is because there is a bug that drops HBM too 500MHz and it running slower. So we dont know how it overclocks.
It is running between a 1070 and 1080. If the custom gaming cards can come out with higher CPU / Memory / not a fucking blower cooler and solidly beat a 1080 and priced well I would seriously look at it for a purchase recommendation.
I have a RX480 so I most likely will skip the first gen because I am gaming well already. It will come down to price to performance gaming wise on the Vega RX cards.
And there is the looming RX mining card crash perhaps early next year. A cheap 2nd hand crossfire setup might put a dent in vega.