Any sort of maptext antialiasing tends to look pretty bad when the map is upscaled.
In my current project, I design all of the GUI in photoshop before exporting and rebuilding it in BYOND. However, I am upscaling the map to 200%.
Here's what it looks like in photoshop:
Here's what it looks like in dreamseeker:
It's pretty clear that with the upscaling, the non-antialiased text from Photoshop looks better.
Perhaps this feature could be implemented like so:
atom.maptext = "<span style=font-smooth:never;> blahblahblah"