Antonio,
If I can boil down what you're saying, it's that trying to be as general as possible isn't really possible, or at least it's the typical thing of generalities having diminishing returns.
Fair enough.
So then my (opinion eliciting) question to you becomes, do you think ajaxhelper should just go away? Or, what uses do you see it applied to?
-Jim
PS to anyone, could you post something about its original purpose?