I don't worry much about WR's anymore, it seems that there are strong groups of WR's coming into the league every draft because of how pass-oriented the game has become. Every year the past few years it seems you have rookie WR's come in and make immediate contributions by year 2 at the latest (Mike Evans, Hopkins, Cooper, Watkins, Beckham, Brandin Cooks, Jarvis Landry, the two guys in Jacksonville, Kelvin Benjamin, Alshon Jeffrey).
As long as we have Romo, Dez, our OL and an elite running game I'm not particularly concerned with what else we have at WR. Obviously you want to be as good as possible but we will have an elite offense as long as we have those pieces in place, almost regardless of what we have behind Dez.
And when the time comes, I'm not too worried about finding good WR's moving forward, it seems to be pretty easy the past 5ish years with how polished WR's are coming out of college.