I appreciate the time & effort that went into this. Unfortunately, the internet allows for people to not only say things they'd never have the balls to say to someone's face, but also to say it in a manner heedless of any consequence because, well, there isn't any. Nature of the beast. Try to take solace in the fact that it's most always because the internet is the only place they can pretend they've got any juice. The more crass/confident the reply, the more beta the person would be face-to-face. Trust; they don't want no smoke unless safely tucked behind their monitor.
Anyway, some interesting food for thought. Rather than pull apart the changes I disagree with, (bout half) I'll say that I like the direction your headed with multiple concepts:
Bloodbath effect on Reaping would help survivability, it's not free heals, have to work for it.
I also like CC immunity being tied to Bind on LB, gives the player some autonomy in when/where to start burst
Communio is certainly cumbersome on volcano. I'd take a considerable potency nerf to see it instant. I'd rather have a sure-thing at 12k than interrupt on LoS twice only for enshroud to expire.
Agree 100% on SAM primaries cast time being shorter. Being completely still within melee range is dangerous even for instant casts so the shorter the better.
I won't harp on it but I will say that Zantetsuken becomes less and less effective at higher tiers as players pay closer attention to statuses and LB gauges. It also takes into account debuffs etc so isn't a guaranteed kill. So if it were dropped to 80% I'd insist that it be a 90 sec max cooldown, rather than 120.
Cast time on Poly is a great idea; as of 6.11 it has zero opportunity cost.
Drop the heavy on half-asleep, no doubt.
Again, A for effort and some interesting ideas o/
Rox