This does appear to be a regression since bug 76901, as when console-setup gets installed by debootstrap, even with the USA layout and variant, /etc/default/console/setup is getting XKBOPTIONS="lv3:ralt_switch"
This does appear to be a regression since bug 76901, as when console-setup gets installed by debootstrap, even with the USA layout and variant, /etc/default/ console/ setup is getting XKBOPTIONS= "lv3:ralt_ switch"