It looks like they took the GOP map and just made a few minor tweeks to it. Democrats can still easily win a majority but it's definitely a map that favors the Republicans.
Are you surprised they have apparently all agreed to this?
The Republicans had all the leverage here, since the backdrop is punting it to a Republican Supreme Court, it makes sense that Democrats exacted some concessions rather than throw it to the court, where they get none.
Implying that humiliating the people who pushed for this thereby creating an aversion to repeating this in other democratic states and delegitimizing the commission along with the supreme court would have been a bad outcome.