You'd probably want any redesign of Wikipedia to start with the understanding that the front page of the English Wikipedia isn't WWW.WIKIPEDIA.ORG, it's EN.WIKIPEDIA.ORG, and that that page is dominated by content --- most notably the WP Featured Articles, which are a core part of the Wikipedia community. Draw the pretty colored lines after you grok the concept. It goes downhill for me as they try to get more technic…
They even propose a feature that shows everyone how much English dominates the other languages in other languages, being the colour bar. And if you want something not in English, you have to find the nigh-undiscoverable 'roll over top right corner' to have the language selecter appear. They're pushing really hard to make non-English users feel like second-class citizens.
Then they redesign the page to make content harder to get to by putting a giant damn banner at the top of every page. Literally a third of the page is the banner. It's a wonder they didn't suggest putting some 'subtle' advertising in or something.
This redesign literally made be laugh out loud several times. My main regret is that I don't have a marketing budget, because then I could ensure these jokers would never get any of it.