Problem is the amount of niche skills PLD has. Skills like cover and shield bash.
Clemency is there because before EW PLD had no self sustain making it really bad in dungeons and clemency was your saving grace if a healer was just that bad and it could help you carry dungeon runs with bad healers.
I think PLD needs a soft rework to address some skill bloat and ablities. Divine veil not giving the PLD is still questioning because shake it off exists.
I dont think Clemency needs to be removed. If it does then it needs to be replaced with something better.