This data was collected from the Vengeance campaign using the PvpAlerts addon over the course of the full week of gameplay.
Limitations: The player account used to collect the data is exclusively Aldmeri Dominion and plays in the pacific timezone on PCNA.

Total class composition across all factions


Class composition by faction:


By comparing to the complete data from GH+Vengeance since U44 with the Vengeance alone data, we can see that Vengeance appears to have encouraged an uptick in the number of players on Templar, Arcanist, and for EP and DC Necromancer (Unfortunately I neglected to save the dataset before it was contaminated with Vengeance data so I can't do a clean comparison).
U44 through Vengeance:


Some additional stats from Vengeance

The majority of players only played 1 character in Vengeance


This was relatively consistent across all factions:


Global distribution of player's alliance ranks in Vengeance:


Alliance ranks broken down by faction:


Note that a 0 alliance rank indicates that the character was seen in some data (e.g. the kill feed), but that the player was not directly observed with the reticle causing the data to be missing.

Compared to GH+Vengeance since U44 (below), we can see what appears to be a slight shift in the distribution of alliance ranks particularly in the range >15, this appears to me to be an indication of either players were taking advantage of the double AP to player newer/lower ranked characters or that mid-high alliance ranked players were slightly more likely to sit out the vengeance test.



I don't really have any hard conclusions to draw from this, I mostly just thought it was an interesting window into the bigger picture of how people participated in the Vengeance test.