My 2 cents on the issue: We should have a better forms of meta-programming to solve this sort of issue generally. With the power of first-class functions and laziness, we can get away with a lot of things without meta-programming, but case expression syntax is not first class, so cannot benefit from the flexibility proffered to the rest of the language.
tl;dr give me easily extensible syntax, rather than having to run to GHC devs every time I want a new or different flavor of sugar. -- Dan Burton
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