No
As L.Dutch mentioned, the hovertext is a network wide tag. Without changing the code, it can't be changed on a per-Stack basis and getting consensus for what that new text should be across the entire network would be... interesting.
You're point is well taken, but what really needs to happen (IMO) is for participants on Meta to clearly explain what they think and up-vote or down-vote will mean in the context of their post
And this applies to both questions and answers. Though I'm far from consistent myself about this, I've taken the time to explain in some posts what I expect an up-vote or a down-vote to mean. Doing so does change participants' behavior, because sometimes "I agree with what this post has to say" isn't the intent of the post.