The comments made by meddler and the other reds seem to go against that actually. They are toning down early jungle damage while also still making it so you can afford more health potions than before.
The way Kindred is designed with their marking and sustain is supposed to reinforce the idea that they are supposed to be a jungle champion. They may have the changes in mind, but I don't think the sustain was put there strictly because of the preseason changes.
Also, to those talking about other adc jungles (twitch and quinn respectively), yes you can still jungle them. I have before, it can be fun. I've even done well as them. That doesn't mean they are designed to jungle, nor are they really good at it. Take Twitch. Yes he can gank. But his sustain in the jungle is awful, and his clear time is dreadfully slow. Anyone who can jungle half way decently will see a twitch, and know to just counter jungle him. He has no dueling power (especially early in that first jungle clear!) abd he has no escapes.
The way you need to look at it is this. Yes I can pick this champion for X role. By what about them makes me want to play them there instead of just using Y champion who can do the same things but better? It's why malzihar ad might be a thing in normals, but you will almost never see it in ranked. Same goes for a lot of the other off the cuff roles.