it's saying that anywhere that there was an sbin, it now is a symlink to it's sibling bin

it's also saying that because /bin and /sbin point to their /usr counterparts, /bin and /sbin will point to /usr/bin

So currently: /bin -> /usr/bin

    /sbin -> /usr/sbin

    /usr/bin

    /usr/sbin

    /usr/local/bin

    /usr/local/sbin

we'll have: /bin -> /usr/bin

    /sbin -> /usr/bin

    /usr/bin

    /usr/sbin -> /usr/bin

    /usr/local/bin

    /usr/local/sbin -> /usr/local/bin

(all assuming that I'm parsing the description correctly)

which all makes sense, we'll have /usr/bin and /usr/local/bin, where the latter is for user-installed executables and the former for system installed executables.