Based on fflogs statistics all tanks' dps are within like 2-3% of each other when played well (95%+ percentiles), with war mostly on top. The things that make pld really powerful are the utilities, and the "easy" unpunishing rotation where war is has the strictest and most punishing rotation.

Intervention is really good in fights with many tank busters like neo exdeath, you can basically have intervention up for every single aero 3. Combined with sentinel or rampart, intervention in a "free" cd for the other tank (30% mitigation from sentinel + intervention is as powerful as war/drk's most powerful mitigation outside holmgang/LD), while still mitigating damage for yourself, so it's really powerful for mechanics that hit both tanks (twin bolt, terminal antilight). Cover having 20% mitigation makes it essentially a free rampart when you can coordinate cds with the other tank. You can use cover + awareness + sheltron for o3s critical hits without using up your own personal cds for picking adds. You can cover + rampart + sheltron the #1 aggro healer after the almagest following grand cross delta, so you don't have to fight for aggro while they do multiple big aoe heals. If you time it right cover and rampart will last for both aero 3 and earth shaker, that's essentially a free bonus rampart for 2 tank busters while making aggro management easier (instead of provoke + 1-2x halone while the healer is using cure 3 and medica 2, you can just provoke after they're done healing, then have them use lucid).