[MENTION=205]TwoSix[/MENTION]
""To me, the ideal outcome is that great weapon fighting and two-weapon fighting are roughly equivalent (within 10% damage) for a neutral use case, like champion fighter."
Another point for Mr, my ideal "fix" would be to not drive for identical or close enough to not matter outputs gor radically different choices. Instead my preference would be for radically different choices to produce radically different outcomes.
Outside of white rooms now, there are significant differences in builds based around TWF and gwf for instance. The consolidation under dex is likely one of the bigger ones when rsnge gets into play too.
But, for me, as z for instance of how my mind eorld, instead of trying to find ways for dagger-dagger to duplicate the hard hitting but lower odds of a hit outputs for maulers, I would rather see them get options yo evdn furb increase the better chances of getting hits.
So maybe you get an option for that off- hand dagger bonus action to give you advantage on your stack sction strikes.
So, maybe, you get a feat that lets you lower damage on a hit by flat amount but improve your attack roll by a proportional amount.
Let them be not just different flavors of how the same damage is delivered but actually different tools that excel at different challenges.