You found an engineering sample 8c/16t Zen 2-based Ryzen with unspecified clocks beating a 4.7GHz 9900K at 27% less system power and 40% lower TDP to be "underwhelming"? There's no pleasing some people.
And you do realise that ES Ryzen was literally half of what it's capable of because there was only 1 chiplet?
I suppose it depends on what you were looking for from the event. If you were hoping for amazing GPU news, then the event was underwhelming, but, from the CPU side of things, it was a great show.
People were really hoping for Navi news. On the graphics side it's really disappointing that 7nm Vega was the highlight of AMD's GPU presentation.