I don't know if I'd say there have been more or less players PTFOing, but I certainly have seen less players that try to stick around their squad and team. There's definitely more people that will fly off with Sundance, or grapple off with Mackay, in this game opposed to sticking near their team or squadmates. Of course this has been an occurrence in previous games as well, but it definitely seems more pronounced in 2042 since there are less incentives to sticking near your squad/team.
And like you said, there have always been those pesky wookie snipers in Battlefield games. Now they just don't have a built-in weakness like they used to, IMO they should be weak to vehicles, and as a result they have even less incentive to play with their teammates than in previous games.
The average internet warrior will almost never prioritize teamplay over lone-wolfing it unless he is forced to or greatly rewarded for doing so. In previous games, it was at least extremely apparent that this is what they were trying to implement. It's wasn't perfect; no matter how important teamplay is there will always be some people that just ignore it and lone-wolf anyway. Devs can't really FORCE people to use teamwork (except in games like It Takes Two lol), but they can certain guide them in that direction. This is how it felt to me in previous games. In 2042, there is even less importance given to teamplay, and to me it does show in the game. I see less variety in squads (90%+ sundance and angel when I play) and even when playing with friends there's less inter-squad teamwork than there used to be, simply because there doesn't need to be.
And it's really up to the individual player whether or not they like this change. Some people don't like feeling like they need to rely on teammates, and those people will most likely enjoy the flexibility and power that the specialist system gives them. Personally, I always liked the feeling in Battlefield games that I needed to rely on my teammates, and my teammates needed to rely on me, and without each other we would not be victorious. It was one of the things that most set Battlefield apart from COD to me, where one good player could (and would) singlehandedly win the match.