You explained that because DS3 doesn't have "X", it's not worth playing because it "kills the experience"; I simply made a point that other games that don't have "X" are both playable and exceptional. Kind of like you lumping DS1/2 in the same league as DAO/FO3/NWN/et al despite their differences simply because they had "X".
Ok. One last time unto the breach. I compared DS3 in with games like Diablo, DS1-2, Baldur’s Gate and Titan Quest. All of these games are RPG games with heavy multi-player elements. All have Multi-player friendly and significantly better interfaces and utility than DS3. And since DS3 is a successor to both the Diablo series and a direct line descendant of DS1-2 which had significantly improved robust Multi-player functionality (ala the ability to build and carry across multiple “Campaigns”

the lack is significant and noticeable.
If all other aspects of the game got 100% marks, the fact that the Multi-player component of a Multi-player focused franchise game is poorly designed at best would make for a poor game. As I have stated before, that is the major focus and driver for the franchise. You can play single player and you can play multi-player, but on it’s own, the Multi-player components of 1 and 2 are significantly better than in three. Game breaker. Then there are the poor targeting features and the general brevity of the game on top of that. Apples to Apples, DS3 does not compare to DS1 or even DS2 (which was not as good a game as DS1 but was MUCH better than DS3 for it’s time).
"Functionality"? I think games are judged more often by how they play, not what they can do. A great feature on a lousy game is still a lousy game, a great game without extra features is still a great game. Primary and tertiary concerns for most.
Multi-player is NOT an “Extra Feature”. It is the wholesale MAINSTAY of the franchise up to this point. On it’s own, DS1 and DS2 (much the same as the Diablo series before it and Titan Quest more recently), the Dungeon Siege franchise would never have gotten to a second game, much less a third one if not for the robust Multi-player. Neither game was that great without it. Or even very good. They were actually pretty mediocre without that function.
But even if what you say is true, apples to apples, DS1 and DS2 were pretty for their day and had reasonable stories, much like DS3. The fact that DS1-2 have the robust Multi-player make them better by definition than DS3. Or DS3 as WORSE. And DS3 has other problems as well. None of this is in contention. And no amount of avoiding the issue or obfuscating with other unrelated games or topics changes this.
And while they're fun, I don't think either of DS2 or DS3 really [would] take advantage of such a feature anyway, I wouldn't describe either of them as having much replay value given their fairly linear, actiony nature.
You make my case above without understanding it. DS1 and DS2 were intended to be dungeon crawls that you could do with friends. Their ‘replayability’ was almost exclusively in the robust Multi-play components. Components that you sell short and dismiss. Once I beat DS1 and 2 solo, I dove into playing online with friends. And now DS3 doesn’t even have that. What does that say.