Now they're based on Blink, so the they don't have to work on the core features of a browser engine. I imagine that means they have more engineers working on what they class "features for our desktop browser" as in user facing features, rather than W3C spec implementation.
Opera does still contribute quite a lot to blink/chromium (check out https://operasoftware.github.io/upstreamtools/ which lists them), though the gist of what you've said still stands.
