the timing of the div-1 and div-2 halving was bad, but the rationale behind it was very plausible. glancing at the scrims results for most of the teams in each division, i do agree with daffodil that there was a disparity between the div-1 and div-2 teams.
Though, some of the teams in div-2 do not make sense compared to the other teams in main. I looked at a few (e.g. trollface esports and first yarn team ever) and compared it with some of the "top tier" main teams from personal opinion (e.g. rodney and the stangers, my gaming estrogen, yeremy).
I'm not sure how some of these teams ended up in div-2 while the others ended up in main. You can argue experience, though a team like yarn legacy (w/ playmo on demo) has been losing to main teams that i wouldn't rank as high, while teams like rodney can clearly contest in div-2 yet choose not to scrim against div-2/higher level teams? yet teams like yeremy are actively scrimming div-2 teams, are contesting evenly or losing close, and have players with invite exp and are also off-classing on (seemingly?) their worst classes.
you can only base so much off of scrim results if the teams seemingly only choose to scrim teams within the division that they want to play, and in the case of some of these teams, it's clear that some of them were placed in the wrong division and the ruling seems to be a bit biased. I understand that the higher main teams should be able to beat/trade scrims with lower div-2 teams but there's teams in both divs mentioned that clearly should be swapped.
from what i know, some teams affected were forced into their divs (not sure what the exact rationale was). though from personal exp, sword art on9 was given the chance to play in advanced or main in s2 at the discretion of the admins. even though we were capable of playing in low-mid advanced, im not sure what was difference from that ruling to some of the rulings for this season
not to mention that one of the teams has an admins and/or opinions from admins playing in the affected divisions were taken into consideration. I do believe there is some bias and inconsistent ruling on some of the placements but then again, i couldn't be an admin cause i had a ban on rgl (EVEN tho daf asked me to apply).
also i have some bias in this since i'm friends with some of the people involved, though i try to keep this nerd essay as unbiased as possible
tl;dr: inconsistent rulings on team placements from personal opinion for the main/div-2 divisions, I have a feeling admins in said divisions personally had a take into the rulings for said teams