" Absolutely terrible; increasing the signal/noise ratio, in addition to increasing unnecessary white space were extremely bad design choices.
The purpose of Wikipedia is to share information. The changes that you proposed impede that goal by the addition of a step where the user has to "understand" the design, before they can begin to use it.
You should have reviewed mathematical and scientific journals before you begun your sketch work. Those types of publications succeed at transmitting a high amount of information, very quickly. Bare HTML pages also succeed at transmitting technical information at a very fast rate.
Rather than just stating that Wikipedia is in need of a redesign, state your reasons. The design of Wikipedia is not simply an aesthetic designer's problem, it is a problem that has to be approached from an engineering point of view: maximise the information communication rate whilst keeping the design aesthetically pleasing, not the other way around."