This is a nice style, but it has the disadvantage of being the default phpBB style, so it's used in hundreds of different forums all over the web. It would be nice to have a theme that sets us apart from the crowd.
The difficulty here is that while it's easy to install and use different phpBB themes, to create one from scratch is a long and laborious process. There are literally dozens of different files you have to edit. Our dear administrator is a very busy man. While I am confident that we'll have a change of theme eventually, I encourage you not to hold your breath.