What, the grey bars? Crappy is a rude way of putting it, but yes they look pretty bad. I think that's probably an artifact from the Qt4 days. It looked fine with Oxygen. Rest looks fine to me. If you think it looks busy, well the screenshot has a lot of panels enabled, just to showcase the features. IIRC many of them are not shown by default and a user would only keep the ones they need, since the interface is customizable.