Why didn't Galactus use any of his powers? He's a cosmic god that can teleport, fire beams of awesome power, transmute matter, etc. You could have displayed that, yet mention that each time he does something he depletes his energy significantly, so the plan becomes Reed baiting him away from his ship and draining his power cosmic reserves for a final attack.

Also wouldn't this film have benefited with other heralds the four could fight? Terrax, Firelord, Airwalker, etc?