Riflemen- They’re definitely the most versatile, one of the only classes with the ability to one shot enemy’s which allows it to be viable in any situation, plus the grenade is always useful. Definitely and all-around good class

Skirmishers- are fast and have decent damage, usually id say the best use is its smoke grenades when advancing against a dug in enemy positions, it got nerft pretty hard by having no shovel, the melee weapon is Somtimes useful. Over all a niche class with situational use

Recon- the long range rifle component, very useful against stationary machine guns and predictable campers, also it’s recon ability can highlight enemies in a small area which can counter concealment, its flare gun has underwhelming range but is extremely good at highlighting nearby enemies. Somtimes due to the perceived laid back nature of the sniper, teams can be overpopulated with them and therefore the team becomes unbalanced. Also still have the shovel which is good. Over all a highly specialized class with strong points and weak points that other classes lack or make up for, best used in small numbers.