I'm on the fence about this proposal
Since the reduction of the question upvote value in 2011 was not an efficient measure to suppress low-quality questions, I don't expect an effect in favour of good questions by undoing this change. I expect no significant change in user behaviour here.
So the net effect is giving out a lot of reputation at once and by proxy giving out a lot of privileges at once. It will also make earning privileges easier, since even a controversial question voted +3/-3 already earns 24 reputation points. I don't know whether this is a good thing or not, maybe it will lead to other necessary adjustments like increasing the question downvote value or adjusting the privilege ladder steps.