Rank 6 Kindred here.
Gameplay wise, she doesn't seem... right. Her kit is slightly clunky, but the transition from her E to autoattack in rapid succession is actually pretty slow and can make a lot of people trip up. Her kiting in the jungle is awkward, which is understandable since not many ranged are in the jungle. She is extremely vulnerable to counter jungling, but her ganking is actually decent.
Balance wise, she is sort of balanced. She needs a lot of "even changes" where some of her things are switched for more thematically pleasing things. Case in point, her Q and R.
Fun wise, when she's ahead, she's pretty fun. However, if you're behind, I feel more tilted and useless than any other champion in the game.
Creativity wise, I'mma split this one into two sections. Lore and aesthetic wise, I fucking love Kindred. Her design looks sleek, vintage, and just... so pleasing. Looking at her aesthetic and hearing her voice is like taking a calm, silent, walk in a snowy forest.
Gameplay wise, her kit is offputting. She's the embodiement of death, so her kit should be a bit more... assassin like right? But she does mediocre sustained damage. She feels like a weaker Kaisa.
Changes I'd like to see on Kindred:
Passive:
The first 2 marks should spawn on jungle monsters on your side of the map.
The 3rd and 4th should be scuttle crabs
5 and 6th should be enemy red and blue
Also, make it so that Dragon and Baron are ALWAYS marked.
Q:
No longer grants attack speed.
Now makes her next basic attack deal bonus max HP damage that scales HEAVILY with her AD. (I don't want to see any tank Kindreds out there)
Marks increases the damage the 3 arrows deal, and the on hit damage granted.
Dash speed is increased
Everything else is the same.
W:
This is fine. I like this ability.
E:
No longer has a wind-up animation, or cast time.
Everything else is the same.
R:
Increase how much allies are healed, and slightly decrease how much enemies are healed.