The most reasonable conclusion to come to is that this era is definitely stronger. Harder to stand out = stronger. What could be more reasonable? lol
One could argue that the collection of star-players today are less impressive than the collection of star-players from the 90's (for example). I don't agree with the idea, but I can understand if someone makes the argument.
As of now, I think the NHL has a great depth of stars. We have Crosby, Ovechkin, Benn, Seguin, Kane, Toews, Giroux, Malkin, Getzlaf, etc. and we have McDavid, Matthews, Laine, Pulju, etc. up and coming future stars.
Is it stronger than the A-list from the 90's? I don't know. But it's not a lot weaker that's for sure.
The reason it's harder to stand out these days is probably not because the league is so much stronger (although the 4th liner from today is better than from the 80's, no doubt) but because the way the game has developed. Obstruction is maybe at an all-time high level (maybe even higher than in the DPE) and the game is more structured and defensive orientated than ever. It's not like we don't have 100pt. talent in the league. We do. But the way the game is coached today doesn't support high offensive numbers.
The league has a lot of talent and I hope the NHL has the brains to cut down on obstruction and encourage offensive minded hockey again. Not that structured defensive game-plan can't be appealing. But I just personally enjoy more free-flowing creativity and the kind of atmosphere that encourages players to try offensive moves instead of playing safe all the time.