My orthopedic surgeon (sports medicine specialist) says this type of tear is not really surgically reparable. Apparently, most tears are around the edges, whereas my tear goes more or less straight into the middle, where there's no blood supply. You surely know more about this than me, but from talking to him only the outer third or so of the meniscus has blood supply, so stitches to the middle section are only there to hold things in place, but the meniscus won't actually heal.
He told me he could 'repair' it surgically, but that he wouldn't count on it holding. Could last six weeks, could last six months, but almost certainly would't last six years (unless I stopped working out). I go in every year or so for a checkup and he's said as long as there isn't any extra damage, I can put off a TKR as long as I can withstand the pain. Most days it's fine, just uncomfortable, but occasionally it gets pretty bad, that's when ice and compression sleeves are my friends.
I just keep reminding myself it could be worse, and Goggins would tell me to stop whining and do the work.