Looks like no FAF games for me this week
. Anyways, some time freed for analytics. I decided to start with my little hunch: Bricks and Percies are quite similar in tech/cost/stats/function, but Percies have huge alpha-strike and better DPS (and UEF has T3 transport, but unit-sharing is a thing); so they are much better fit for T3 drops. They are guaranteed to one-shot your T3 mexes if get dropped (even if your army is near).
I extracted drops (too-quickly moving units), and found 186 cases. Among them:
Brick: 59
Percival: 127
So my hypothesis looks plausible; will dig into that.
Another one was that higher-rated players are more prone to try to drop. This turned out incorrect, see the image. I'll look up the replays manually to check whether there is something off (for example, Bricks/Percies being grabbed by GCs are 'moving too fast' and trigger drop detection system).

Another one: I wanted to visualize brick and percy drops. I could not get map coordinates right, so the lines are scuffed.

I look forward to presenting arguments to nerf Percies (as a Cybran player, yeah
).
P.S. about 1/3 of the replays were too short or empty. Looking for an answer from @Nooby about data collection, especially tick registration - maybe we should implement stuff suggested by @Caliber . Thank you guys, that's getting epic!
P.S.S. I am happy to apply my expertise to my favourite game! Suggestions / hypotheses are welcome