I like that you gave the game some credit, but not all of battlefield is slow paced- the problem is that CoD is too fast paced. You're able to run through streets at superhuman speed and you can quickscope while jumping off a building and still get 100% accurate hits.
Seriously dude. Lay off the youtube videos. They do that shit for weeks then make 1 video with the successful results. I've also never understood why the speed in cod is "stupid and unrealistic" but quake is a fucking amazing game if you like fast paced. Not saying that you said this but I hear this all the time from people.
And I fucking love quake, but nobody I know plays it anymore, but i enjoy CoD so it's fine.
In COD, its alot easier for one man to be carrying the team, and ignoring team mates. It basically results in a fun/fast paced deathmatch- style gameplay, no matter the mode. Battlefield made it a team effort, and an enjoyable one when things worked out right, more enjoyabl than COD imo.
Once again I think that this is a matter of who you play with. If i'm with my friends and we're playing against another group of people who are good, then you can't just run around all crazy shooting.
But then again I mostly play Search and Destroy so maybe I get a different experience than most people.