Please describe a workable "original" idea, then if it is such an obvious thing to do. The gaming industry is decades old. Everything has been done at this point, and the differences in games in the same genre are primarily in gameplay mechanics. Most shooters have variations of deathmatch, CTF, conquest etc. To use your example Survival mode (which ME3MP's gameplay is a derivative of) wasn't invented by Gears or Halo, and has been a staple since classic wave based arcade and tower defense games.
This just seems more like a thinly veiled attack on MP in general, which would make sense if SP games were making comparatively greater strides in originality, but they aren't. You get a new story/characters, some potentially more refined gameplay mechanics, but ultimately the games are fundamentally the same as their predecessors. ME singleplayer hasn't at all been an innovator in that regard either.
Not at all. I love multiplayer in games. In fact, I generally prefer multiplayer if it's done incredibly well. I just don't care for ME3's MP that much due to it being very boring and redundant. If I were in charge, I'd get rid of their "survival mode" and replace it with a fully integrated coop in which one player would host the world and another could join as a "companion." Besides the main story, players would be able to complete any other content together. A great example of this coop system would be Far Cry 4 or ACU (after it was fixed). I would find that kind of multiplayer to make far more sense for Mass Effect, a story-driven RPG, rather than some generic shooter game mode that's been around for decades. That's just me though.
Are you nuts? Mass Effect single player hasn't been an innovator??? You ever heard of the dialogue wheel? That, alone, is one of the biggest innovations of Mass Effect. It has affected other RPGs, the latest example being Fallout 4. Not to mention, the voiced protagonist, save importing, continuity between games, these are all innovations in Mass Effect that have affected every BioWare game sense. Come back to reality. Please.
I've heard of that one guy who spent... 500 dollars to max his manifest? They've also said he had a gambling problem. Basically, a friend of a friend told me thing. And even if that was true, I'm willing to bet that was an extreme case, not a regular occurrence. I mean, you have to be pretty damn dumb to continue throwing your money away after you figure out the RNG. And despite the credit(or rather, the lack of it) the press gives us gamers, I'd like to think that, in general, we're actually smarter than that.
So unless you can back your statement with some graphs, polls, evidence... whathaveyou... I'm gonna call it a BS and say that MP did well because it was, surprisingly enough, well developed and fun.
Gamers aren't smarter than that. Most gamers are incredibly dumb. If they weren't, microtransactions wouldn't work and most of these games would be shut down. Lets think about this for a moment. How exactly could ME3 MP make money without microtransactions? All of the DLC for it was "free content." Of course, it actually wasn't free because microtransactions paid for it. Regardless, it was entirely the game shop that made the MP a success, not the MP itself.