I think the problem with soccer is that the field is too big. I also think that they should put waist-high walls around the perimeter of the field (like hockey). Those many time stoppers when the ball goes out of bounds slow down the pace of play. I think these two things would make the game much less boring to watch.
I agree as well. Although that would wear down the players even more as less time to breath.
Soccer fields vary a lot in size. You see big ones because you're probably more used to seeing international matches.
The ball going out is no big deal. They often just throw the relevant player another ball.