This nearest-neighbor resizing we've got looks horrible. Please, someone, write a patch.
What I'm talking about is the way that fonts, when resized, become severely pixelated when you resize them to anything below a certain size. They look like crap.
Also, buildpics are affected, and almost as bad. It can be hard to even see what the unit is.
All the games ever made, and possibly more, have better resizing than Spring.
For an example, look at this random screenshot:
http://spring.unknown-files.net/picture/3194/1/
The bad text resizing is easily seen on the second and third row of the orders panel. The bad buildpic resizing is seen everywhere.