The 'dilemma', such as it is, boils down to making a choice between a predictable linear workflow (which is what Gamma Correction gets you) and the shambolic mess we had  without GC.

The problems you're experiencing are due to shaders designed to cope with the shambolic mess being used within a linear workflow.

You'll have to read up on all this, which has been explored in depth here and at RDNA, if you're to understand what's going on.

Linear workflow changes the way that lighting and shaders are used. The good news is that once you have it figured out, things become simpler. The bad news is that a lot of old shader and lighting setups have turned into crap, and you'll have to either adapt them to your new workflow or abandon them forever.

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