How Not to do the Jaws effect and replace an interesting lead with a boring one....
There has to be some payoff and buildup. When you use this to save money instead it doesn't work.
also Bryan Cranston's character was interesting, had strong motivation and is beloved. Instead we got "im a soldier and love my family". WOW what deep development. Please let me cheer for this guy! please kill off the interesting scientist so we can only follow him!