I have seen a great deal of questions which had very well researched answers referencing many studies etc...
But getting to an actual answer to a question (e.g. "yes/no/depends on factor XYZ") required reading a 2-page-long essay masquerading as an "answer" :)
Basically, what the answers lacked was an executive summary.
Some examples: (I can come up with more/better if requested):
Q1. Does the community feel that having an executive summary is a big plus for an answer that is so well researched that it has very many references/studies, some with not-100%-clear results?
Q2. If you agree, is there some mechanism by which this can be encouraged? The most obvious one (votes) is Not A Good Thing, since the answer is usually already good enough to easily warrant an up-vote.