Would dumbing down the UI by using less graphics, and using simple text improve performance?
Yes, but most likely only minimally.
Most of the client-side performance hit is from the rendering of the play area, not the UI gumps.
Ashlynn_L said:
I don't imagine so as the UI is built from graphical elements and the file size seems to be based on image dimensions (from what I can tell) rather than complexity. So your pain spike icon is the same size whether it's a really elaborate thing or just a black square with PAIN SPIKE in verdana.
You are correct that changing the graphics, but keeping the same resolution, will not improve performance.
Changing resolution and removing screen elements, however, will.