I'm currently undergoing a 3-month upgrade to my own site after 10 years of stagnation.
My suggestion is to redesign the layout of the site to be more compatible with mobile browsing, but the functionality is fine as it is.
I've come to trust WW because of the lack of advertising and self-promoting links, and the lightning-fast page load time. This has giving WW the reputation that so many other sites want. Don't become like the others and lose what sets this site apart from the rest.
It really is about end-user experience, and for this WW is already tops. I'm sure you guys don't hear enough compliments on the parts of this site which really matter. It's because you make it see so simple it's taken for granted.