Because of Elbaf Usopp's development has been paused for 7 years, just for an arc that will probably be the next Zou and be a let down as Oda can't turn around Usopp's character in 38 chapters. A typical Oda arc:
1. Hundreds of side characters
2. Lore
3. Luffy needs to outshine everybody
4. All the straw hats need to have something to do regardless of how minor it is
5. Supernovas
If Elbaf never existed Usopp would never have a chokehold on his development, but now he's screwed
1. Hundreds of side characters
2. Lore
3. Luffy needs to outshine everybody
4. All the straw hats need to have something to do regardless of how minor it is
5. Supernovas
If Elbaf never existed Usopp would never have a chokehold on his development, but now he's screwed