Over the last couple of months – but specifically since the rolling arty hard-cap was deployed at the very end of December, I have noticed far fewer variation in Tiers present in my matches. This is particular true Tiers III-VI in my experience where I am starting to encounter matches where almost every (and sometimes every) tank is of the same tier. This was not a totally unknown phenomenon previously, but recently it has become an almost every-day occurrence. Even in higher tiers I am often seeing one Tier dominate a match providing 9-10 tanks, and then only a smattering of other tiers (scouts and SPGs included).
Do I think the arty-cap caused this? Well, not really. More I think the arty-cap helped me notice what was going on. If I were to make a guess it is because the number of people playing World of Tanks on the EU server has risen. When I started playing World of Tanks I only rarely saw a server size of 100k. Now I quite regularly see a server size of 160k. Also when waiting to start a battle I am regularly seeing hundreds of folks queued in Tier III-VI tanks, and often 1500-2000 overall. I reckon this simply means the matchmaker is finding it easy to fill out matches consisting mostly or entirely of the same tier. It may be that the rolling arty hard-cap is also encouraging this in some fashion – it is something which has a few unintended consequences.
On the whole I have no complaints about this phenomenon. While it does make some battles feel a little less varied, on the other hand an all same-Tier battle has a wonderful dynamic quite unlike any other battle in the game, and is also a lot of fun.