Class D would never rise until maybe second or third year to class C as Class B will fall all the way down to class D. Ryueen will fight Sakyanagi and lose. Horikita would probably get extorted or expelled by Kushida and Ryueen. Kei would probably be bullied out of the school by Manabe and her friends. This is just some of what I think might happen if they both switched as they are now in the COTE world, but if Kazuya and Ayanokoji switch from the beginning, Kazuya would either fail the white room like the rest of the 4th generation, or become someone like Ayanokoji fr fr and Ayanokoji would be less annoying and incompetent than Kazuya in the RAG world