For what it’s worth, I don’t see a lot of problems with the matchmaking. With one caviat though - I haven’t played any tier 1-4 vehicles since the release week. Not sure if tier 3-4 really suck now.
Oh and another caviat, I was playing heavies and TD’s exclusively. Only now I am aiming to switch to the medium line by going through the KV-1S to the KV-13 and so on.
So as I said, I decided to check out the mediums, so I parked my IS-3 and Ferdi and went back to the KV to unlock the KV-1S (I went through the KV-3 earlier on my way to the IS-3). I had zero issues with matchmaking while making the necessary 26K or so - some games I am in on top, some in the middle, some at the bottom. Then I got the KV-1S and tracked my progress a little. On the first day I had 9 games, which consisted of: 3 on top, 3 in the middle and 3 at the bottom. The next day it was 3 at the bottom, 2 in the middle, 2 at the top (I played less that day).
So, for me, on those days, the matchmaking was pretty much perfect. I’ve made 2 observations though.
Several times I was like 3rd-4th from the bottom. But when I actually looked at the list, it turned out that a whole bunch of tanks above me were actually the same tier as me. And only a handful of tanks were above me, something like one IS-3 and like 3-4 IS/Tigers. So yes, while technically I was (mostly alphabetically) at the bottom or near it, practically tier-wise I was very much in the middle.
Second thing is, on my second day, I had a streak of 3 “bottom” games in a row and then a mix up of “top” and “middle” games. At the end of the day, it FELT like I had majority of the “bottom” games, even though statistically it wasn’t the case.
Take it as you wish - it’s only about 20 games on 1 (heavy) tank so it’s not very scientific but that’s my experience so far.
Last thing, you are supposed to do completely different things in the “bottom” games comparing to where you are on top. Such games are also more challenging but often are more interesting (but in a different way). Don’t ride (and promptly die) in front of your pack when you are 3 tiers below them, find a smarter way to play that match and it will feel much more satisfying.