in the next big dem wave election, hopefully this would be a dummymander
Its not likely to be. Dummymanders usually involve spreading your voters too thin across multiple districts, and of the 10 Republican-leaning ones, I think they're all more Republican than any seat the Democrats currently hold in NC. Even if Ellmers and Foxx lose, their seats will almost certainly be picked up by the Republicans again later on, simply because Democrats usually can't hold on to 55% McCain districts for very long.
Either way, the map is almost guaranteed to see a net Republican gain in seats, so in that way it's highly unlikely to wind up backfiring on the Republicans any time soon.