One thing to note in Codega's article is Mercer calling WotC's OGL v1.2 + CC moves on D&D "a grandiose step in a grandiose direction":
Matt Mercer and Marisha Ray spoke to io9, saying that they will always support a Dungeons & Dragons environment that allows for “new things.”
gizmodo.com
Now I'm not a native speaker so maybe I'm understanding it wrong, but isn't grandiose a rather negative term? Kinda like something that has a lot of pomp but not because it deserves to have it, but is big only to have an air of greatness?
If that's the case, Mercer's comment seems like an incredible backhanded compliment. I'd almost say he's dancing around the non-disparagement clause...