Bigger isn't necessarily better, but it's not necessarily bad, either. The Wii U Controller is large. No biggie!
Website Electricpig put the Wii U Controller into context, noting fun facts like you could apparently fit seven Wii Remotes across the Wii U Controller's face, and that it's 10 per cent longer than the Wii console and 24 per cent wider than it.
Nintendo Wii U in numbers: Just how big is it? [Electricpig]