Adding a articles links to sidebar of all blog post and home page for visitors help - is consider as Google over SEO in google new algo?
I have never heard something like this before. Those links are considered as internal links and doesn't mean it is over riding the Google Algo or Google webmaster quality guidelines. I would also suggest you to go through webmaster quality guidelines/rules for more clarifications and to see if your website comply with them or not.
I don’t think that would be considered as over optimization, I have seen many blogs with category pages and they are doing perfectly fine in the search engines. I believe, this should be considered as internal linking architecture and this is useful for the user.