Depends on the aspects.

I think fighting at range is as good as or better than ever. Not as diverse as in past years because of the natural course of refinement. Effective techniques are kept and ineffective or dangerous techniques are eliminated.

Athleticism is at an all time high because that is how evolution works.

Toughness is at an all time low because it is not necessarily to our society anymore.

Educated infighting like truly great trainers has joined the dodo, perhaps these things are connected.

As a generalization I would say this era is the same as all eras. Some good divisions, some bad. The good rotates like the bad.

At first glance one would think there is less quality depth because there are less major upsets but I think that is a product of exaggerated preparation. Across the board in all sports the perceived favorite gets more and more successful. Because the perceived favorite is in shape and eating right and not drinking the night before an event. Our greater understanding of how to peak the bodies performance means that the better athlete doesn't "not have it that night" as often.

Gone are the days an NFL QB will drink a 6 pack before a game like Sonny Jurgenson. The sport is ruled by those that do the most to be prepared. As is boxing and all sports. For better or worse sport is homogenized. I say for worse because I love variety and surprise and it seems these days the greatest surprise is a great fight actually being made. Lots of great fights happen but few are made, it's mostly by accident. Perhaps it always was.