The bonuses provided by the exotic ghost are quality of life improvements at best. They don't increase your power, they don't make it easier to clear the raid or top the scoreboard in the Crucible. Extra XP just means you're getting that next Bright Engram slightly faster than before, which of course just provides more unimportant cosmetic loot. And improved PE rewards? So we're getting three tokens and a blue now? Hardly game changing.