Of course Peach would have positioned herself to spot the teams. However, I predict that she believes that revealing that information before the actual finale telecast will be detrimental. For any who remember it the list that puddin publicized of all the eliminations throughout AR11 took away all the fun of that season, so it is not likely to ever happen again. I expect that Peach will sit on what she knows for about 5 months until just after the first or second Sunday in December. However, I expect that all Detectives or others can present any available information in the interim.
If Peach has a different perspective than mine expressed above I am sure we will hear form her.