In Battlefield games classes normally restrict what weapons and gadgets players can use. In 2042 classes will not restrict weapon use but will limit gadgets. Instead of limiting weapons classes will gain a proficiency in a weapon. For example; Medics will be more proficient with SMGs (exact details below)
Assault + Assault Rifles: 3 Extra Magazines
Engineer + LMG: Improved Dispersion while Crouched or Prone
Support + SMG: Faster Draw Time
Recon + Sniper Rifles: Immediate, constant and steady scope
At face value these are hard to evaluate. When I had first heard they were thinking of proficiency I thought it would mean a more dramatic impact; such as an assault player being unable to aim an LMG. But stuff like assault getting stuff like three extra magazines on an assault weapon? When is the last time you've run out of ammo or lived long enough to go through stock magazines?
I don't think players desire for classes to return was just to have a limited set of gadgets to worry about when facing an opponent. The guns classes were limited to was a huge part of the system. Without I am not sure what the point of having the classes is. This could have just been a simple pass through gadgets to limit them to specific specialists.
On the other hand these changes do at least bring classes back to the game in an official capacity without taking away combinations many players enjoy as far as their main pea shooter. Gadgets getting restricted will certainly freshen up some things (no more Mackey zip-lining in with C5). I hope this means vehicles have a little bit of a return knowing that not everyone can pop out with a rocket launcher.
The changes will hit in the next month or so and shake the game up. I've been playing a lot less 2042 lately so we'll see if I am around for the changes. If so I'll probably have some more thoughts.