They have been better about this lately in re: giving cues other than color differences when a mechanic requires you to distinguish between two possible cues. Squares v triangles v circles, rays+lightsounds v flames+firesounds v lightningballs+electricsounds, etc. There's always room for improvements in accessibility though. And better cue placement in general, even for people who don't need accessible cues. Like, please stop placing pips over people's heads behind nameplates and markers.