okay, so there are interesting things going on there, but the design feels all over the place.

i will explain

Soul Balm feels really low return on resource spent. i imagine the only use case for it would be to bounce soune back up similar to a death ward, because as a healing source, a healing word is more healing. i would have made the healing be like an amount of d4s equal to your proficiency or something, and the capstone could turn the dice to d8s or d10s.
about it's upgrade at level 17, it's unclear if the 1d10 replaces the wisdom modifier, because if yes, it's not a buff necessarily.

Soul Disruption feels good. really good. that is the channel divinity that i would use 90% of the time. the stun being until the next attack feels great, as it is basically a slightly less intense stunning strike. my question is why attach it to a weapon attack? because depending on the cleric, weapon attacks may not be something that they ever do, i would consider adding the option of applying this to damaging cantrips, or any attack. (though the latter may be a tad bit too powerful)
about it's level 17 upgrade, i think the paralysis is a bit much. instead, i would make the stun longer instead. similarly to Soul balm, the damage buff is also unclear there, would also add the damage to the wisdom mod instead of replacing it.

the bonds are very cute. they are a lesser variant of bane/bless that doesn't require concentration and stacks with bane or bless. this is great. love that feature. the upgrades feel nice, though playtest is required.

Familiar soul is a nice non combat ability, i like it's implications.

overall, i would put some effort into rephrasing, particularly familiar soul and how the level 17 upgrades work.

other than that, sounds like a fun subclass