General

Shadow partner works the same way it always does, as said above you might have the cascade damage on under the system settings instead of the default one. all it does is double the amount of lines on your skills with a reduced amount of damage on those other lines (70% i think)
Body count now maxes at 3 but still gives the same buffs as 5 did so its better now. (use shadow instinct after you get a 3 stack for max benefits)
Meso mastery is what procs the random mesos that drop ( they sometimes drop when you get hit if you notice)
The new meso explosion animation sucks and the skill and damage work the same regardless of 1 meso or 50k meso exploding

Shadower instinct is maxed at 20 and body count limit is 3, but they give the same att as before. I dont think that shadow partner only does one line of damage, maybe you could change in the setting the way numbers appears when you attack to find out. Also, things gets better when you reach 150 and get Flip The Coins (+25% dmg), specially if your not funded.

It's not pick pocket giving mesos, it's your meso guard dropping them.

My max level for shadower instinct is 20, I think that's the highest it goes but I'm open to being corrected. When you say shadow partner only does one line of damage, do you mean my attacks should deal one line total, or that the partner adds one additional line? Because I'm only getting one line total and really hope that's not applied at 70% damage.

That's a damn shame about Meso Bomb, though. One of my favorite skills and practically the only reason to have pickpocket on when I don't have a meso magnet and (ideally) my friend's Night Lord nearby.

Mexo Explosion is now pretty much useless.
Shadow Partner only deals 1line of 70%? damage
Pickpocket is weird
I think your max level for Body Count thing is low so 3 is the max you get can atm. MAYBE WRONG HERE.