With every last adjustments considered here, the Switch has this situation now for Q3 :
If the same pace could keep going until Dec 31th, the Q3 would have a total of ~13,9 millions, which could have been possible with Animal crossing fitting the gap in December. This makes me wonder if they have not decided to extend the momentum by delaying AC just to avoid a too huge spike in FY2020 Q3 and remain with nothing else for the next 6-9 months.
The gap between 2018 and 2019 will shrink for week ending November 23 due to Black Friday being a week later this year. AC coming out in 2020 helps spread out the heavy hitters for the Switch.