Some viewpoints may be both Pro and Con, depending on your point of view or the context they’re in. For example, having a Q&A site aimed specifically at Technology questions means you have a more refined audience, but also limits your user base and what questions you can ask there. As a result, for the question “What’s the best Q&A site for subjective questions?”, this could currently be listed as both pro and con.
In the absence of this feature my current approach is to list such items as Pros, leaving users to associate these reasonings with their votes when choosing their preferred options.
This also means you have to be careful in wording some viewpoints; “The site is only available in Russian” is worded negatively; so implies con; “The site is available in Russian” allows you to use this as a pro, and have a counterpart “The site is not available in English” as a con.