The thing is that people have completely different experiences with this game. For me the connection quality is already a dream come true in most games (especially after the desaster that was BO2 to me). But I also know some skilled people near my location with good internet who seem to have a harder time struggling to survive in this game. If you somehow have the chance, I would suggest testing it out before buying (but don't be mistaken: dying fast is absolutely normal in Ghosts).
Well, in BO2 I lost most gunfights in close/medium range even with the FAL because after 7 fast shots, I see several hitmarkers and keep taking damage, if I wanted to do good, I had to take a pistol and go crazy, Fiveseven with TacKnife and Silencer <3
I think I'll just wait for the dedicated servers and see if people have constant smooth connection.