this is just my opinion no hate 
Current Positions: Leader, Main Rapper, Lead Dancer, Sub Vocalist, Visual, Center
New Positions: Leader, Main Rapper, Lead Dancer, Lead Vocalist, Visual, Center
I only changed her vocalist position because her vocals are underrated af
Current Positions: Main Dancer, Lead Vocalist
New Positions: Main Dancer, Main Vocalist
I don't even know if I have to explain this.
Current Position: Main Vocalist
New Position: Main Vocalist
I didn't change any of Wendy's positions because she's one of the Best Vocalists in Kpop, periodt.
Joy:
Current Positions: Lead Rapper, Sub Vocalist
New Positions: Lead Rapper, Lead Vocalist
The fact that Joy's only a sub-vocalist- Any group would be lucky to have Joy as a Main Vocalist 
Yeri:
Current Positions: Sub Vocalist, Sub Rapper, Maknae
New Positions: Lead Rapper, Sub Vocalist, Maknae
I really like Yeri's rap and sometimes even prefer hers over Joy or Irene's so I only changed her rap position.
Now SM needs to give Red Velvet a comeback
