1) labels as values in standard
2) control over memory position offsets, without linker script
other than that a few more compiler implementations offering things like checked array bounds, and a focus on correctness rather than accepting the occasional compiler bug
the rough edges like switch fallthrough are rough, but easy to work around. They don't need fixing (-pedantic fixes it already, etc)
maybe more control over assembly generation, such as exposing compilation at runtime; but that is into the wishful end of wishlists
1) labels as values in standard 2) control over memory position offsets, without linker script
other than that a few more compiler implementations offering things like checked array bounds, and a focus on correctness rather than accepting the occasional compiler bug
the rough edges like switch fallthrough are rough, but easy to work around. They don't need fixing (-pedantic fixes it already, etc)
maybe more control over assembly generation, such as exposing compilation at runtime; but that is into the wishful end of wishlists