User rating site content

Let me introduce a small project that may nevertheless be useful. Web metric ( wmetric.com ) allows visitors to rate any article on your site by several parameters. With the help of Web metrics, a visitor to your site can say more than plus / minus, and at the same time he does not need to spend time writing a comment. It integrates simply - copied, pasted and works, registration is not required for installation.

Voting contains 4 parameters that seemed the most common (interesting, boring, useful, useless, reasonable, stupid, competent, incompetent). The average values ​​for each parameter are displayed by arrows: positive ratings - up arrow, negative-down. The longer the arrow, the higher the score. In addition, there is one synthetic parameter - “percent of ideal”. It is considered this way - the Euclidean distance from a specific set of values ​​(voting) to the maximum “good”, “ideal” point is calculated, and then this distance is divided by the maximum possible distance from this point in the space of possible polls. The meaning of this parameter: how close is the article to the ideal. If the parameter is 0%, then the article - sucks, and if 100% means the article is perfect.

A choice of two voting options, "only positive ratings" and "positive and negative." In the first variant, the user votes only in the positive area, for example, he can estimate how smart the article is, but cannot estimate how silly the article is. This option is probably better suited for copyright sites - no one wants negative evaluations in their personal diocese. In the second variant, voting is possible both positive and negative, which allows, for example, various authors in a competitive mode to measure their works within the boundaries of one site.
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Authorization of the user when voting occurs through one of the social networks. Sessions are long-lived, so for the next vote a site visitor will not need to re-log in, even if he comes next time to your site in a month.

I will be glad to hear your expert comments and advice.