Thing is being more tanky for a DPS trade off doesn't work in this game, everything can be planned out with mitigation planning making it effectively useless than being good with a average healer, no raider would ever bring it to Savage/Ultimates. After clearing P8S week one, it isn't just Paladin that is bad for it, there are 4 other jobs really bad for P8S with it's crazy DPS check that you're griefing the team if you're running them.
Paladin can easily have a rotation fix if it's rotation bursts are synced on the 2 min-60s bursts accurately instead of cutting GCDs just to be in sync (Oh wait, that makes it lose DPS). SHBs Paladin was fine for allowing to skip 1 Atonement Or Holy Spirit and remain on par with GNB/DRK. Adding more GCDs and nerfing Atonement to the ground made it terribly awkward to play, the highest potencies is from Holy Spirit/Blades but you have to open FoF for the highest effective DPS, but oh wait it screws the job over from burst windows, and oh wait it can't burst straight to Holy Spirits because it's a DPS loss. Honestly this job is fundamentally broken and close to unplayable for how it works, and it's almost on approach of 2.0 Warrior. It's got the miti but where is this job going to? It's an utter trash mess griefing tank, even Warrior got a correct a buff, adding slightly more potencies isn't going to fix Paladin. GNB/DRK will still trash it to the ground because "They sync to burst windows".