Not necessarily good at attacking, but good at footballing. That's what Marcelo is. Attacking really is a team effort, and the more technically sound players you have, the smoother and faster your offense runs. Our defense is partly shit because we don't have good footballers playing in it.I don't disagree with that first point, we'd be far better off with fullbacks who can play, but for me you need a blend; sure Marcelo might help us going forward but he wouldn't drastically improve us as we'd still be just as crap at the back, and great at attacking or not he's not going to add a goal a game himself. Zab was close to perfect in the sense he could do both roles to a high standard & that's the sort of player we need on each side - I'd take someone who is 7/10 going forward & 7/10 defending rather than someone who is 5/10 defending & 9/10 going forward personally. We should have enough attack power in our front 4 that having a fullback whose good at attacking rather than fantastic at attacking should be more than enough.
There is a psychological part to it too. When you dominate possession with incisive pressure, the mentality of your opposition becomes that of a team simply trying to survive an onslaught.
Teams in that mind set often can't attack themselves.
This is how I want us to look and play.