WiiU's CPU isn't weak at all. It's solid fact that we're talking about a well balanced and wisely engineered product, with a lot of potential to improve.
But yeah, Hyrule Warriors doesn't prove it. It's a nice looking game, alright, and most importantly it's fun.
I wouldn't call the Espresso powerful, I'd rather say it's smart: thanks to its architecture and optimization it can achieve a lot, with little "raw power".
People claiming that the Wii U is just a 3-core Wii, or that it's on par with ps3/x360 are delirious.
Overall I'd say the Wii U is waaay more powerful and capable than most people think, but Hyrule Warriors doesn't show this in any way. Nor does it need to: it's a fun game, looks nice, plays good, that's its job.
Besides, noone should expect a Warriors game to push any kind of boundaries when it comes to visuals. It's just not their thing. Nintendo on the other hand has already proved how capable the system can be with it's fp games, and even lazy ports can prove this point, by working on the console with no optimization at all, despite the different architecture (x86/powerpc).







