1. I would agree with that for the most part. I would disagree with your opinion that the guns in this game are superior to those in other cods. Almost every gun with stopping power in mw2 is superior to the guns in ghosts. The guns in mw3 were also superior. Even some of the guns in black ops 1 would be able to compete with the guns in ghosts. The galil, commando, ak, famas, and many others had a 3 shot kill range and fairly high rates of fire without much recoil.
2. The hit detection is better than most other cods although I think mw2 was the best.
3. The real reason you seem to die instantly is lag. The person shooting you sees hitmarkers, while you will often times just drop.