To describe in 2 words - colourful mess. Too much colourful pictures, they are distracting, also what you could access from just opened page before you need to scroll to now(utilities, docs). Other than that 2 columns on the right ruins symmetry and makes design overloaded. Big gaps on left and right(in 1080p) isn't a good thing, if there is free space main, now not central, column should be stretched(as well as being shrunk with lower resolution). As for themes - probably 2.0's themes will be ported to new design so I'm not worried about that.
I'll describe how I see it:
Top section - as is in 3.0 with drop down menus;
Left section - 2.0's right section(newest hacks, translations, utilities, etc.);
Right section - all that social stuff(I don't care about, but probably needed);
Bottom section - carousel sliders with small imaes of featured stuff(won't fit more then 2-4).
Sorry for being harsh, but design makes me want to avoid visiting RHDN, which I don't want to.
P.S. @Sara-chan, it's very pleasant that you found my old Emumetal theme good. Done in plain notepad and PS with little knowledge of CSS and Nightcrawler being amazed(to say it mildly) on how much errors validator gave him
Though those was just missing ";" mostly, eh, some memories... Thanks, I also always used only that one, thought others will grow on me, but they didn't quite. Still liked Metroid theme, Jazzy and those tribute ones. Guess other theme of mine, Technofatal wasn't liked by anyone at all