CN only has access to what WB gives them. That's why they have the crappy prints and if you see those a.a.p. CN ones then you know those are going to be in horrible quality. While some shorts have been aired restored, not all of them are restored. Hop, Look, and Listen airs with it's original titles, so does Hiawatha's Rabbit Hunt, the latter not so restored but isn't too bad.
You can find both cartoons on DVD.
WB keeps the remastered versions for their DVD and other releases by Warner Home Video.
Another thing high pitch cartoons end faster and there's nothing wrong with high pitch or low pitch, they all end the same way.