People are so quick to proclaim best ever whenever something they like comes out.
I didn't think this game was anything special.
The shooting felt good, but apart from a couple of open areas it was a typical modern shooter with heaps of cutscenes and (to me) a boring story.
How I wish somebody would do a real remake of Doom or Duke 3d, that open gameplay with todays graphics would be awesome! (and yes I know there are graphic mods).
One of the best for me, but that depends which shooters you're judging this by. "Couple" heh, that's an understatement. If it didn't do much for you, can't do anything to convince otherwise. Plays very differently from typical modern shooters. I found this to have some of the best storytelling in a FPS, only game up there is The Darkness where I had as much an emotional stake, along with System Shock and Deus Ex. I find it more consistent in greatness among the various aspects than Half Life 2 (weak vehicle sections, not all puzzles were great, not as much character interaction time, shooting feedback outside of magnum is not as impactful), Shadow Warrior (weak shooting, lots of kitchen-sink encounters, bullet sponges), Metro (some mediocre and frustrating levels, inconsistent human AI), FEAR (aside from the best shooting feel and exemplary AI, too repetitive in environments, some cheap scares compared to Condemned, really bad story), Bulletstorm (has many modern tropes packed around really refreshing gameplay where shooting is the exception, all about creativity, has a love/hate personality, story or characters are not as interesting), RAGE (only good part about it is the combat). Then there are the old school style shooters like Painkiller that have really fun combat and weapons but not much else. This game has the best of what I like in many FPSs, so to me that's why it's one of the best shooters ever.
The only games above this are the immersive sim RPGs (Stalker, Deus Ex, System Shock) but those games don't have the best feeling combat. Both DOOM games have some of the most variety in enemies, I wish this Wolfenstein was as unique but it's not going supernatural, bit more grounded, so understandable.
This game felt like a well-executed amalgamation of the genre, but nothing more. It was safe.
In context, not sticking to many tropes of modern design in a big-budget package is why I wouldn't call it safe.