A lot of people have come to the same conclusion, it's a largely subjective experience.
So then, I pose the question, how do you we come to the conclusion that fights are better than they used be? It's a claim I see quite often.
More mechanics is the most obvious argument and I agree that too few mechanics makes things sparse, but I do not necessarily equate more with better.
To be honest objective analysis seems impossible and that the only standard is experience (or 'fun'). That would require a large amount of data gathering however. I wonder if Blizzard has a social research team.