Suggestion 1: A setting to set a "maximum multiplier" for the GUI scale in resolutions above 320x200.
At 1920x1080, the default GUI scale multiplier is 5, which has a nice for standard GUI stuff like letters, but any graphics displayed at half size (such as life icons while in-game, or level emblems in menus) thusly have a multiplier of 2.5, causing the graphic to alternate between a pixel being 2 and 3 pixels wide/tall, which looks bad to me.
I would therefore like to cap the GUI scale multiplier at 4, so that half-size graphics don't alternate in pixel size, so that I can get a more "consistent" pixel size in the GUI.
It would be extra nice if this could be made to not affect the title screen (main menu, yes, but SRB2 logo, no), and also extra nice if graphics displayed with the V_PERPLAYER flag could get a separate setting (so that I could do a scale cap of 4 for single player, and 2 or 3 or such for split-screen if 4 is too big). But even without these things, a single game-wide GUI scale multiplier cap setting would be very appreciated by me.
Suggestion 2: An option to "un-squish" the HUD in split-screen mode. When playing with a friend, I'd rather take an occasional half-lack of mod support (as in v2.1) over the HUD being annoying to look at even without mods (as in v2.2).
If general HUD size is a problem, suggestion 1 might be beneficial for higher resolutions.
Suggestion 3: If title cards (e.g. "Green Flower Zone 1") are shown "globally" at the start of a level, not something that one player might see while another doesn't, removing the V_PERPLAYER flag from title card stuffs might also be nice, so that it displays nicely centered in the window rather than each split-screen player getting their own title card that always says the same thing as the other's.