Can't say it's bad, but the WaraWara Plaza looks kinda complicated. How do I get to my game and stuff? I'm pretty sure that was on the Gamepad, so what's the Warawara Plaza for? A more interactive forum-esque thing? I like the Wii's Home Menu so much more than this.
The WaraWara plaza is just one half of the main menu, y'know! Its only for chatting with your friends, look at 1:16 in the second video to see the "actual" menu. It's very much like the Wii, and you can choose whether you want to view the Menu or the WaraWara plaza on GamePad (other thing is on the TV).