I see the 'peer review' aspect of your question and I understand the peer review aspect of codereview.se. However there is a difference. Codereview.se is about alternate solutions to a problem and the pros/cons of each. Taking this question as an example, the answers show the OP different ways to accomplish the same thing - some are 'more pythonic', some have better performance, some just use alternate methods to achieve the same goal. A genealogy question is a different kind of problem. The 'who/what/where/when' questions should only have one answer (eg you only have one birth date). However, as the commenters note, you may have many sources for that one answer, they may disagree, or you may need to infer from indirect sources; all of which lead to reviewing the 'how' for those facts would we useful and constructive.
Most of our 'how' questions are already like codereview.se (ie answers give alternatives on 'how' to find the 'who/what/where/when' you are looking for). And I think the 'how' questions give you your forum for 'who/what/where/when' (ie the background for the 'how do I find the next fact' highlight the previous work done). So we may already be closer than you think.
One issue that may arise is the scope of the question. There appears to be sentiment to keep the scope of a question very narrow (ie about an individual fact like a person's birth place) instead of broad (everything about an individual). This could be relaxed for these kinds of questions if the intent is to have the equivalent to 'peer-reviewed articles' mentioned in the question since they tend to be about an individual. For example the four articles in the most recent (as of this writing) articles in The New England Historic and Genealogical Register are:
- Henry Sherman the Elder and His Wives
- The Ancestry of Mary Whitten (Whiting), Wife of Ichabod Crippen
- Rediscovering Matthew Fuller (Died 1752–53) of Colchester and Salisbury, Connecticut,
- Sampson1 Dunbar and His Family
All of these articles contain alot more that a typical genealogy.se question at the moment. If on the other hand, this intent is just the logic/evidence for a single fact (eg an individual's birth place and date as in the example in the question) then the current narrow scope could be used.
The best way to find out is to try. Why don't you craft some questions along the lines you are thinking? Put a reference in to this question so people know what you are trying to accomplish.