Final stats for update 8.3 have been added.
In total, there were 139M battles by 402k players recorded in the database during the update 8.3.
The TOP20 best performing tanks list has undergone some big changes.
AT 15A has taken the top position - maybe the armor highlighting change has helped it and other well-armored tanks?
Predator Ultramarines is 4th after the usual T28 Concept and Object 252U. I have never played it, but I have always regarded is as an average tank. Maybe the armor-highlighting change in update 8.1 boosted it a bit? Although, it seems to have performed above average (inline with Dracula) in update 8.0.