I think I would rate both 2016 and Eternal about the same, these were almost perfect shooters.
2016 was such a breath of fresh air when it launched, fast paced, extremely fun, a bit of challenge.
Eternal, this has the fans divided, I understand some of the complaints. It was a natural evolution of 2016's gameplay and they tried making the player use all the game has to offer.
The challenge was amazing as well, playing on normal, every fight was exhilarating, the DLCs kicked my ass a bit.
The real negatives for me are that it has too much platforming for a shooter and a DOOM game and also a bit too much story, 2016's minimalistic one was perfection.
TDA, I don't even want to replay this game, a dumbed down hybrid of action and shooter with matching colors for blocking, just mashing block and melee, rinse and repeat.
Sure it's sort of fun in a challengeless kind of way, it looks good, spectacular scenes and moments and ideas, but ultimately for me a letdown, not necessarily a bad game.