The Worf Effect can be a powerful tool for showing how powerful a new character is, but there are multiple pitfalls. These pitfalls are common, even in the originators of the trope. However, they can severely compromise the effectiveness of the trope
Overusing it on the same character.
With rare exception, overuse of the Worf Effect on a singular character is less likely to make the opposition seem powerful, and more likely to make the character seem weak. For instance, the princesses Celestia and Luna get defeated too often by the season's antagonist. The end result is that they are said to be so powerful, but never get to show it off, which could make some wonder if they really are that powerful.
Use of the Worf Effect too early
The Worf Effect needs to be used on characters whose power is well established. If a character gets worfed before their power can be properly established, it seems less like the character's opposition is strong, and more like the character is a whimp. This is a mistake made by Ben 10
multiple times. Ben 10
has done this at least twice. First his main Mighty Glacier
alien got worfed by a villain, in its first appearance. Not as bad the the Ultimate Form of Ben's Planet-busting alien Way Big got it. His only appearance is him getting Worfed by an Eldritch Abomination