Pakistan may be humiliated at not being informed, but the people within ISI who keep leaking the name of the CIA head would also leak the news of an attack.
ObL would have escaped again.
He was taken completely by surprise, secure in the belief there would be no attack without a warning from his friends in ISI.

Pakistan knew this and so agreed in advance that it should happen without their knowledge or consent.
They have expressed concern.
There could have been an incident.
There has been not rebuke, no change in relations, no diplomatic response, nothing.
They are grateful.
30 000 civilian dead and 5 000 military dead.
Grateful.

"military incursion in order to carry out an unnecessary assassination"
Your opinion Jim.
Does any government in the world share it.
List them please.
Not Pakistan obviously, or they would not be so glad he is dead as to call it "proper justice."
They clearly understand that it was necessary.
Are you better informed Jim?