Its hard to concentrate on lats with all the other muscles involved in nearly every movement that attacks them. Ensure you are focusing on form and not cheating with momentum, utilizing other muscle groups etc. I find if I go a little lighter and maintain slow, strick form my traps burnnnnnnn. Thats when I know Im doing it right. Everyone is different though.
Absolutely, that's the #1 movement for back. When I started doing pull ups, I could only do one. I would do one, rest a few seconds, do one more, then another until I got 12 reps. Hey, it's still 12 reps, but in time, I was banging them out. I didn't even know my back was developing so well until people started telling me.
Shrugs front and rear, upright rows and heavy ass farmers walk... all you need. Of course with a weight that allows you to feel the burn at about rep #8.
Hang cleans are where it's at for traps.... at least I respond very well to them. I've made tremendous progress with behind the neck pull downs as well