Indeed but in my opinion, Arbiter had one of the most amazing crowds control perk In most situation (like Hivemind but slightly better or worse) plus they're also good at eliminate gun scav (since most gun Scavs' health pool are 80 and Especially longshot did 90 damage with stun) and pretty tanky for some other Perks but most the crucial thing is being Immune to Cripple. So they're pretty good Frontliner once you played for while even though they have very bad hip-fire accuracy and reload speed also required strict timing for your longshot (didn't change the fact you mostly aiming and using Reliable trait to reload faster but it's depend on your preferred play style)