Clemency - Execution no longer interrupts action combos.
That is from 6.1 Patch Notes, so you can no longer use this as one of your reasons for wanting to get rid of it.

If you don't like it, simple - you don't use it. Don't penalize us that do use it when we have healers who all but refuse to heal or have died from a mechanic and the PLD is still fighting a boss with some DPS with them.