Dead keys are particularly fun, as it takes two key presses to produce a result. Accessibility of keyboards/layout could indeed be improved. I switched to custom US layout, because of too many issues with a non-US layout. My custom layout uses AltGr combinations to add a few local characters. It is a bit clumsy, but at least keyboard shortcuts work most of the time.
Polish has a "traditional" (typewriter) and "programmer's" (US + AltGr) variants of the keyboard layout. Everyone uses the "programmer's" one, even people who don't know what programming is.
