Why Change That?

[McMax]

When a comic book or standard book for the matter is adopted for the screen some change is necessary. Some things that work on the page won't come off on screen and some other compromises have to happen like story compression and composite characters. But others leave you wondering why change that? One of mine is from the MCU, that Captain America's mighty shield is vibranium and not the vibranium-steel alloy that it is. A scene in which Howard gives Cap the shield and tells him that it was made by his friend Myron MacLain and is a alloy of vibranium and steel. What are the unnecessary changes that just bug you.