On the Grim Focus (relentless morph) change.
First and foremost i speak from the perspective of a solo stamblade player.
I am of the opinion that the Nightblade class is on that operates as a solo class, one that is self reliant and selfish in its play style, like a rouge or assassin would be. And as such i feel that the ability for the Nightblade to provide its self with a wide array of self buffs but offer less in team play is part of the classes identity.
The removal of the minor berserk buff is obviously a sore point for those of us that play Nightblade solo (which i assume most of us would) and removes what i feel is something unique to the Nightblade class. Only one other class has minor berserk easily on demand, and that is the Warden. The warden also has the bonus damage from slotting Animal Companions skills on bar.
How about, rather than removing the buff altogether, have it give the buff while slotted, and drop the minor endurance to compensate. Then require the skill to be activated to build up the 5 light attacks.
I feel removing both Minor Endurance and Minor Berserk is a bit much to do in one blow.
In terms of the heal for the bow attack, this is easily negated by dodging the attack, which is now easier to do after the delay and increase in travel time of the attack.
Other changes like the surprise attack change, and fear changes I can understand.
As for Magblade, much more help is needed there in PvP from what iv'e read, however i don't really play the class in pvp.