The two units have very little in common now.
Almost all small arms are 50% less accurate versus a unit in cover. Heavy cover provides 50% damage reduction on top of that. This makes a squad in heavy cover about four times more durable than it is out of cover.
The damage on the JLI crit rifle is low, but it has 90% accuracy vs cover instead of 50%. It also has chance to instakill models below 75% health. These two bonuses combined heavily mitigate the benefit the enemy gets from cover.
Pathfinders don't have that accuracy bonus and can only crit models below 40% health. They're more of a force multiplier unit: they can do a lot of damage if a Rifleman squad is around to set up the crits for them, but they're pretty weak on their own.
IMO jaegers should be more like pathfinders. They have somewhat similar costs and the same reinforce costs, but jaegers are way tougher and have plenty of abilities, and their sniper is much better.