I think the idea of a 5 class system could be very cool, and it could open up more gameplay opportunities for people. One alternative could be to have the Assault, Medic, Support, and Recon classes, and give the Assault the ability to attack vehicles, and give Support the ability to repair (Kinda like in BF1). One additional thing I'd like for them to change is having "Conquest" actually be the game mode title to have the gun-locked classes (since that's how it classically has always been). And call the unlocked mode be called "Sandbox Conquest" or simply "Open-Gun Conquest". They could even just leave the Open-Gun Playlist to the Portal since I feel this new conquest mode could be pretty divisive for the player count for either mode.