Would you think it is better if they, say, increased raid-wide damage 1.2x extending the number of expected tries to kill tenfold?
Knowing how these things are getting balanced (you set up rough proportions -> test -> take care of obvious outliers -> do some math and alter a single common multiplier), it's just so weird to be reading "assessments" like "if it takes two days to kill bosses, that's obviously worse than if it takes two weeks".