The World of Warships community has gone through similar steps, but the encryption is much more straightforward. Some of the packets are pickled Python, some are just binary blobs, so there are some undocumented packets but for the most part people have done a decent job of figuring it out and building tooling around it such as the minimap renderer: https://github.com/WoWs-Builder-Team/minimap_renderer

There’s an odd unspoken and somewhat understood agreement between the developer (Wargaming) and community though: the community actively reverse engineers the game to document the packets and WG kind of looks the other way (except when they recently threatened me with a perma ban :) — they even use the tooling the community creates for official tournaments.

In this article the author mentions Riot partnering with external companies to provide more rich data set and analytics. Do they use these tools/data sets for tournaments as well? Is it known at all how these partnerships are structured?