Evernotes rapid expansion into new product categories over the past year may have left its core software wanting. Phil Libin, the companys founder and CEO, acknowledged several problems in a blog post today and says Evernote will spend 2014 improving the stability and simplicity of its core product. Libin wrote in response to a blog post on Friday by former TechCrunch editor Jason Kincaid, who lamented problems with Evernotes stability, privacy protections, and customer support. I could quibble with the specifics, but reading Jasons article was a painful and frustrating experience because, in the big picture, hes right, Libin wrote.