Kindred is not as OP and blend as QQ'er makes it seem I guess ?
AA range : 500
E is % MAx HP is PHYSICAL dmg (Not even magic, so if you build Armor it works all around)
Cooldown are HIGH (9sec Q, 18 W, 16 E... W and E lowers slowly with lvl, not Q) unless you use Q in W aura (2 sec cooldown then).
Ult cooldown is also HIGH (150/130/110 with lvl)
Heal on ult is FLAT (200/250/300), it only last 4 seconds where nobody can't go under 10% Max HP
Even if you mainly control Lamb, It's Wolf who makes most of your dmg with W Aura, his own AA that can DAMAGE STRUCTURE with W and he lands the %Max HP dmg on E.
Base DMG doesn't increase that much with level (+30 on Q and E, no increase for max HP% without AD, +5 dmg for W but CD lowering is important)
Feels Very squishy and easy to melt if caught : No escape outside HIGH CD ult, 1 sec 70% slow and Q which is very short dash distance on a CD unlike Kalista.
I personnally think it's overral balanced.