Yes, it is probably too little and too late. They gave everyone using the OGL a short, sharp shock and this mealy-mouthed bit of gaslighting isn't going to change enough minds to make a difference on that.

It might stop D&D Beyond from bleeding out, but the folks who've built successful small businesses around the SRD and the OGL aren't going to forget what they just learned. There will soon be at least one new SRD and Open License that will be more along the lines of Creative Commons licensing and have nothing to do with WotC.