They handle the mechanics horribly, sacrificing the PLD instead of sharing the ball, then the WAR is forced to Holmgang in Defiance (don't know why he's in Defiance if he's Holmganging anyway, all his CDs should be available), then the DRG and SCH die to Perpetual Ray. He had Sentinel available for the incoming Ray or they could've tank swapped and had the WAR blow all his CDs + double IB + Equilibrium + SW to heal through it without needing much outside healing due to the low healer mana. On top of that, he had Holmgang, which could've saved him if the healing + mitigation didn't work out. Another option would've been to tank swap for the one before this, have the PLD sacrifice himself, then tank swap back to the PLD to allow him to HG for the last Ray + have Sentinel available if needed. There were so many options and all would've resulted in a kill, unfortunately they panicked and lost.
PLD needs some buffs/tweaks, but this isn't proof that PLD "can't do Savage Alex" - they're literally completely fine for this floor. The problem was, and remains to be, that DRK can output higher DPS while mitigating more magic damage at lower gear levels. This, in turn, made DRK/WAR and WAR/WAR more viable for progression by default and left PLD in the dust. Even if content where physical mitigation is more important, if it still results in lower DPS than DRK/WAR then people are still going to bring DRK/WAR (or WAR/WAR). There is a DPS disparity, but it is not so severe that PLD can't do the floors DRK can do with a few ilvl upgrades. Maybe this is why SE isn't responding - because people are blowing it completely out of proportion and SE is wise enough to know what actually needs to be done. I'm not one to put much faith in SE, but I'd trust their team before I trusted forum posters who try to pretend that PLD can't do A4S @ i210. That's insanity.