The only reason MD's maps look worse than other gerrymanders is because of the odd physical shape of that state (and incumbent residences). Dems should not compromise unless/until there is a ban on gerrymandering nationwide. Though it may be a moot point, since a remap could probably be done with a similar partisan result.
That is probably unconstitutional.
If that stance had been taken in the states like AZ, CA and the other commission states, gerrymandering would be the rule in all 50 states. The only way to do this is for the people in each state to stand up and demand reform and for the minority party in these states to join that movement.