This is my OPINION
While Catapult most certainly has its uses, I feel that Morale Booster is an overall better feat to have. Sure, I'd much rather have Catapult if my enemies are grouping up, but I can't rely on that happening all the time. Therefore, Morale Booster is superior in that it affects all of my allies and not just a radius (like the Catapult). It also boosts damage by a deceptively large amount. It's not Catapult levels, obviously, but certain attacks like Warden/Berserker top heavy or just about anything by Shugoki is absolutely brutal when it lands. Throw in some defense penetration and flat out attack bonus stats and the most versatile feat in the game proves its worth.