The MM changes mentioned here:
https://worldoftanks.eu/en/news/general-news/matchmaker-changes-march-2026/
have apparently started being tested, since the 2.2.1 patch notes said:
"Due to the scale and complexity of the future improvements, we will be testing new matchmaking improvements on the EU1, EU4, and NA3 servers during this version update to ensure their quality and effectiveness."
(people reading this might be thinking "NA3?" - afaik this is what WG calls the merged NA server)
Clearly not all of these things are being tested yet, the most visible one being that LTs don't yet have roles. But the question then is, which changes are currently being tested and when should we expect the rest? Will new changes be added server side or will we only see changes in major patches? It's obviously hard to give feedback without knowing what is meant to be happening and some communication about what's going on would be nice.