I think one of the biggest strengths of the website is the current design, actually. It's a classic. The colors, how clean it is, how easy on the eyes it is, the layout, everything is great.
All I would say is that if you do end up doing a mobile version, make sure you keep the desktop version as an option for each user, so those of us who like it the way it is can ignore the mobile friendly version.
Nexus mods with their site redesign where they are blowing up everything, making it super-jumbo sized, is really dumb in that they should just keep offering their current design too, which is suited for desktop as the desktop version…lol, it's like, they don't understand that they can have both!
Unfortunately, a lot of people have been brainwashed into thinking change = automatically good and an improvement in today's society, when it often isn't the case.
All the advertising they are constantly exposed to in the mass media has brainwashed them into thinking this way, because changing website designs, at least as far as I've observed them, often take a turn for the worse, not the better (lol, but not as if they want to hear it, because that would hurt peoples feelings, and we are all about not wanting to hurt peoples feelings these days)