The times I’ve been low on ammo in a fight and had to switch back to single shot to conserve ammo/ Pick up enemy weapons or switch to just a hand gun have been amazing. It’s also extra tense as if you get into a long gun fight ammo gets really tight. Happens rarely though as you can start with 400+ bullets and up to 2 guns.
The auto reload is also really annoying when you have a under barrel shotgun attachment and you can’t just switch to it instead of reloading.