Yeah, they were hitting it with everything they had, ground based firepower and air support.....lots of explosions but it just kept on going. Then ernesth100 showed up and started asking questions and

As for the sub scene, that may have been scrapped if they indeed reduced the scale of the creatures, because I don't believe the MUTO at the airport could not hold a sub under it considering it would have had an issue lifting one of the larger jets on the tarmac.
I may be wrong but it didn't seem large enough to do that.
You must show no mercy, nor have any belief whatsoever in how others judge you... for your greatness will silence them all!