Currently there is no usability standard for themes that are allowed in the themes directory and I think this is a problem. Arguably a blog IS a website and as such should have some common requirements for usability – especially navigation. Navigation is central to a usable web experience and so many themes fall flat on their face in this respect. It would be great if there were a simple usability requirement for inclusion in the theme directory for things such as:
Consistent navigation (optimally breadcrumb based) on all pages
Adherence to web standards so it will work in any browser
Is anyone else tired of lame themes that don't even have a link to the homepage or proper navigation? I'm not talking about making the standard so rigid that it excludes the supernumerary possible innovations in the space, it would just help to have a simple, uniform set of basic requirements.