As long as your argument isn't that Burnes isn't an ace, I can see wanting more from Woodruff, specifically as it relates to this season. However, Woody's numbers since coming off the IL are certainly ace-like and he's gone 6/7 innings in all but three of his outings, with one being his dominant start against the Rays where he was on a strict pitch limit.
As regards Scherzer, yes he's been dominant since coming off the IL. But he's in a different historical class to begin with, and Woodruff's numbers since he came off the IL aren't even that far off from his. That's why you have to look at the whole picture, which the Fangraphs chart I highlighted does. Scherzer is not listed because he doesn't qualify due to injury, but if he did, he would rank 4th with Nola. Either way, there's room in the game for multiple aces, and virtually every baseball analyst would agree that Burnes, Scherzer, and Woodruff are all aces.