Ok here is prof Dux to answer all the questions so far (the ones i can answer that is).
Q1. I can't tell the difference to be honoust, but its possibly because i don't wear headphones and I've been playing with the TV volume quite low. But i have noticed when I purchased ninja pro, if a fall from a high location i don't make any noise at all.
Q2. Again I can't make a judgement at this stage.
Q3. I havent unlocked warlord pro but I'm assuming you're on the ball there.
Q4. Can't tell yet, But I'm guessing each time you pick up a scav bag it only replenishes one at a time.
Q5. Ghost pro: I've unlocked this and nothing can detect you except for blackbird and attack dogs.
Q6. Blackbird is like having your team-mates on your radar, except they are displayed 'red' triangles. Lasts for about 30-45 seconds. So you can see everyone on your radar.
Q7. Launcher, Flame, and Shotgun cannot be put in a combo. So it leaves you with a combination between any sight attachment/supressor/and ext or dual mags.
Q9. Havent yet unlocked Hacker pro but once i will i'll let u know.
Q11. Yes its very much like sleight of hand but you only do it in succession of 1 reload only (as it's two mag's tapped togther).
Hope that helps with the questions so far