The media told us numerous times that he had key information on strike plans, bases, and procedures that would have been very useful for "combating terror." If this is all true, I cannot see how eliminating him and creating a martyr for a bunch of psychos, without first extracting information, was good.
Barring that, I'd say his death was a necessary event.
(I get the feeling based on popular vote, I will be voted down for this. It seems people are voting down on here because they don't like someones opinion rather than relevance. C'est la vie.)