Kindred ADC is a mixed bag, on one hand they were really strong with lane substain and very mobile for escapes/followups, on the other hand their base damage was really weak (kindred basically only had 2 abilities she could use in trades, one which questionably atk.speed autos did more).
I generally like the role of thumb riot stated during the taric rework that every single champion should be possibly played or viable in 2 positions (they wanted to preserve top taric) and with kindred I'm simply not seeing that at all, for how squishy, low damage, lack of good abilities for laning, and lack of any form of substain they have.
Come to think of it... there is no jungler that isn't viable or playable in the top lane but kindred..
Except maybe
but even thats possible. They simply have some kind of tools to play the lane out right that kindred simply can't do anything with.