Doesn't really work like that. The people with the knowledge to be able to correctly estimate the scope of a problem(ie Devs) would simply fix a small issue and the people who have no idea of the scope of the problem(ie players) are likely to think incredibly complex things are relatively easy.
Spell effects are usually a good place to look for inaccuracies but since you are looking for experience, a huge part of that will be learning to find problems on your own.
There is also a list of issues on google code but its pretty out of date
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