Opinions:
The MT-25 is pretty terrible. It's like a slightly faster, better camo'd T-34 (T5 RU med) that sees T10 matches. Havent tried the new T-50, but I'm willing to bet it plays similar to the A-20. It's probably pretty terrible too.
The Brit SPG line is pretty good except for a few stinkers. They have what on paper looks like the worst guns, but in reality the hidden stats those guns get are pretty good. I.E, they fire nearly vertically, hah.
The new map is pretty meh. I thought it'd be better, but everyone just sticks to the mountains on the sides because the town is a death trap if the other team owns one of the mountains. You might see a light play round in the mid, but most of the map is ignored entirely by everyone else. The only good part about the map is that it spawns you pretty close to the action.
Finally unlocked/purchased a Foch 155 (t10 td) and WZ-120 (t9 med), and got gifted a KV-5 (t8 prem heavy).
The Foch is broken. Like, legitimately broken. Great armor, great speed, great camo, and (probably) the best gun in the game. I don't really get what wargaming was thinking. Im sitting on about 4.5k DPG, give or take a few hundred.
WZ-120 is bare bones stock, I tried to play it but I just couldnt do it, it's terrible.
The KV-5 is funny. Its not extremely powerful as far as dealing damage goes and I'd certainly put it behind the IS-6 in most categories, but it's great fun. Its big, takes a good long time to kill, and you'll damage people by doing as little as tapping them with your 100 tons of weight. Best ram so far is 1250 damage on a T69, hope to get a better one =)