I think C2 needs an updated look. If it's too much trouble or there's not enough time for Scirra to do it, why not hand it over to the community and allow us to design our own themes. I know I can already edit the theme colors, but I'd like to replace buttons and icons too.
-Maybe Scirra can make money by selling premium themes in the store.
-Maybe allow users to submit their themes to the store.
-Maybe create a forum just to encourage artists to design and share themes.
DeviantArt is a great example of letting the community influence and shape the site's look and functionality. One way to make users more loyal to your product is to make the product more personable. Another example is Apple products. They probably have the most loyal user base.
Just something to think about.