Thanks for the advice and compliment!
As someone who is relatively new to the world of 3D printing, can under-extrusion cause the overhang roughness?
I've been testing today, and found that if I print on a raft I can bring the temperature much further down (currently at 180), which helps dramatically. I've also slowed the print to 15.
When I tried similar settings with a brim, the model would get proper adhesion to the bed, which is why I switched to the raft.