Panama Canal Expansion- effects on US ports?

I just read an article which stated that the current expansion of the Panama Canal- which includes locks large enough for a 1400’ OAL vessel to transit- may decrease traffic at West Coast ports- while increasing traffic at Gulf Coast/Inland/East Coast facilities.

Anyone here agree? Or Disagree? Why or why not?

Also of note- the new locks will replace the current “mules” with tugs…