I mean like how with metrics you can link to the other side of a metric with “|”, like Left /u metric: =|n.
I am not sure about details but basically I find that I have to repeat, double check metrics like /v/o/v, /v/period/v etc, when one should be able to take that redundancy out since it will be the same for some glyphs.
OK, I can see /v/o and /o/v, or, more generally symmetric letters to each other. But for these cases, you can use the cmd-opt shortcut:
move your cursor in front of the /o
adjust kerning for /v/o with ctrl-opt,
and (without moving the cursor) for /o/v with cmd-opt.
It is quicker because you can keep your fingers on the keyboard, and it is safer because you always see what you are doing. The example you state yourself, /v/period and /period/v, can be a bad idea, at least for reading type. And seeing that right away helps.