Season 1 shouldn't be compared to later Seasons, because it ran for 2 months instead of 1. Longer season will skew the player numbers upwards.
Also, more recent Seasons shouldn't be compared to old without first filtering out accounts with less than 10 battles, because of the 10 battle rule for later Seasons.
Here's Seasons 2 through 9, 10+ battles played:
Season 2 / August 2016 = 38,076
Season 3 / September 2016 = 35,797
Season 4 / October 2016 = 37,040
Season 5 / November 2016 = 35,389
Season 6 / December 2016 = 41,050
Season 7 / January 2017 = 38,102
Season 8 / February 2017 = 34,663
Season 9 / March 2017 = 33,672
From August to March, that is a drop of 4,404 players, or 11.57%.
By itself, that drop isn't a big deal; it is only a concern if the downward trend continues.
Edited by Zergling, 05 April 2017 - 09:18 AM.