So:
1. Jabs and its 140% damage:
Tried closest to 1000 damage. As you can see its something like 140.XX%. So, tooltip state right amount of damage.
2. About actual damage to closest target:
It does deal same amount of damage as tooltip state. So, 140% seems works properly.
3. About raw damage: Live/PTS
a. Initial damage stay the same(not sure why 1 less damage), since nothing was changed here:

b. As Joy said minor berserk is additive, and nothing changed here too, damage is same:

c. But as first patchnotes said damage taken, like minor vulnerability, is no longer additive, and here is buff changes as on live it is suffer from being additive and as result less than 8%, but on pts it is boosting flat 8% damage increase that don't losing its % when combined with berserk:
without and with Slimecraw' berserk while enemy vulnerable:
In theory it look like it work as it intended, but
NO, tested closest damage in pvp in exactly same gear/CP/skillbar against opponent with exact same gear/CP/skillbar and result is sad:
Whatever changed with calculation of CP damage taken it ended in monstrous damage nerf for pvp.
Will test tomorrow with no-cp rule and fully naked to decrease chance of error, maybe it fault of pvp debuff, might be my error but i rechecked 3 times as this damage nerf occured only in pvp.
@ZOS_GinaBruno @ZOS_Wrobel