Absolutely "love" how BW games should be about story and characters interactions in an RPG environment and then you get BW fans advocating more MP in their games and have THAT connected with SP. With the result of ruining the SP experience for those who want a quality story RPG instead of a dumbed down shooter with co-op functions. BW games at their core are about story and characters not co-op shooters. ME3 had a good story not the best one but still good. If you loved the MP more than SP you guys got the wrong game. Call of Duty or BF is more to your alley. I still prefer Rpgs with a solid story and characters. That is why i'm here and not for MP.
People advocate 'more' MP in their games (rather, just MP at all as opposed to only SP). Nobody here from what I've read wants all kinds of ties in with SP whatsoever. I wrote before I liked how it was mentioned in SP, making it part of what's going on; and I wrote, as did others, that I do not want to see the SP actually affected by what's happening in MP. If that's enough to ruin SP for you.. well good luck with that, but that's entirely unsubstantiated. As if the mere existence of another aspect of a game would somehow invalidate your SP experience. God forbid it's actually mentioned in said SP campaign that there's some teams putting up a fight somewhere and letting you know you can participate in that should you so choose. MP ruining your story and characters somehow.. lol.
I agree with Mordokai actually that the MP part is just as much immersive and part of the universe as the SP is, and actually more so for ME3 to me. Though that's a bit of a special case, seeing as ME3 left me with almost zero incentive to replay and immerse myself in the SP campaign. I'd be more bothered with story railroading, bad writing and autodialogue and stuff like that if I were you. You know, things that actually do harm your SP experience and the story and characters. That's where there's a LOT to improve and pick up on after ME3.
As for your other remarks. Mass Effect has always been a bit of a semi-simplified shooter like game, with said RPG environment (the RPG elements in terms of skill/weapon customization actually being weakest in ME2 - a game without MP). So I guess if that's not to your liking you wouldn't have enjoyed any of them. CoD or BF are not even remotely comparable and nowhere near my taste in games, but then again you didn't actually put those there as anything constructive you're just ranting without making any sense. I too prefer my RPGs with a solid story and characters. I also prefer ME to have a co-op element after ME3 which proved BW can more than deliver on that aspect. You can happily ignore that part if you don't want to play it. To me it'll be a ton of fun, immersive, a great community, and will keep me coming back to play long after I've finished with SP content.