It is frustrating when you visit a blog where you can’t like the post or leave feedback easily. Blogging on a network like WordPress or Tumblr gives you a sense of connection and community that is hard to do with some platforms and self hosted blogs. I think you can install the WordPress jetpack to connect it with WordPress.com or another service like Disqus where you can plug in a commenting app to your blog.
Perhaps this is a silly first world problem but you know I am kind of digitally lazy like that. However giving the reader the opportunity for instant feedback can give your blog a better feel of interactiveness.
Comments and likes are feedback which is the life blood of many blogs and their writers. They need it to help guide their posts and writings. So a quick feedback is better than nothing at all. So I think.