If the system was in-depth enough for the player to truly chose their experience, that would be one thing. Imagine if you could select a "classic mode" without any cutscenes, more labyrinth like level design and no gimmicks introduced in other games, or maybe go for the "arena" mode that would turn the game into a very straight forward 2016 esque experience where you just go from one area to the other without any special nu-Doom gimmicks and just shoot demons. The default mode could be called "The Dark Ages" and we would get the game that launched, and for the Eternal fans out there you could disable shield/parry and turn the game into that game of pinball with a gun they love so much. That would require making levels modular and basically work on several games at the same time, but it would be worth the trouble.
But no, the modifiers aren't worth wiping your ass with, you will still hate the game if you don't like the gameplay style TDA introduced. This is what I am talking, iD will have to choose a lane sooner or later, they can't just do something completely different with every new titles.