Thanks a lot for the explanation. However, i do have one suggestion: Many people complain, that certain pokemon are now much harder to hunt. I would suggest considering not only all the other spawns a pokemon has but also the optimal rarity tier the pokemon could be hunted for before you changed the spawns. Or at least correcting the outliners not to the average of all other spawns, but to the minimum among them.
Heracross is a good example. Previously it was catchable at tier 6, now its tier 8 at best. While i do understand, that these tiers are not as meaningful as many players believe, you will for sure agree that it is harder to hunt Heracross after this update. I do understand that you want to eliminate complete outliners, but the fact that it was previously huntable at tier 6 while its now only huntable at tier 8 (and this not even at every time of the day) makes heracross much harder to get. Changing the spawn from 6 to 9 is a bit much in my opinion. If you would change it from 6 to 8, it wouldnt be an outliner anymore while maintaining a better spot than some others as you can hunt heracross at tier 8 all day long.
And with an average of 8.5, going to 8 or to 9 was really a close decision in this case.