In response to one rather trollish comment on HN, Spikefu says:

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[Adobe can't fix what they can't reproduce. I'm sure they work very hard to eliminate any and all instability from the Flash Player on all platforms. If they don't, they end up living in a world of PR hell.]

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So if you're having Flash issues on OSX, the bug reporting tool is here: https://bugs.adobe.com/flashplayer/

Currently there are 4 bugs containing the text 'crash' where the environment is OSX. None of them have any votes, watchers or comments apart from one which has a comment from Adobe saying they can't reproduce it. On that evidence, it's hard to see why Adobe would believe crashing on OSX is a critical problem.