It's OK to be excited about this news. Keep in mind, every single starter on the line is not only new to Kubiak's philosophy and Dennison's zone techniques, but playing next to a guy he's never played next to before. So I fully expected--and still do expect--the line to require some time. Maybe a lot of time. So to hear that they're looking "MUCH" better is very encouraging....
One of my points of optimism about this team is what Kubiak and Dennison have been able to achieve with mediocre talent not just at RB, but on the line as well. It's like cover-two. If you play a cover-two, you don't need 4.4 shut down man corners, you need physical corners who can tackle. Likewise, I've always sort of suspected that in a Kubiak scheme, you don't necessarily need pro bowl offensive linemen either, just athletic ones. Could be that the entire line will look a lot better in this scheme as a result.