Been playing Test Server for about 8 hours today, I have some good feedback. (Not sure if this is the right place...?)
1) The Obj. 705A's armor is slightly overpowered. All that is needed to balance it, is a TURRET WEAKSPOT, like a cupola. The S. Conq has great turret armor, but the roof's weak armor keeps it penetrable with enough skilled aim. The 705A is a sign that screams 'I'm sidescraping! press the 2 key!!!"
2) The Obj 268 4 is uninteresting, and is just another heavily armored, high alpha, Tier X TD. Boring. Also, the reverse speed needs to be decreased, because as of now, running around it and flanking is almost impossible, because it traverses and reverses so damn fast.
3) I really like the IS-M. Unique for its tier, and it is quite a challenge to play, while providing a fun game experience.
4) About the Obj 263. That tank was like the S-tanks or the Swedes. It was unique, required skill, was balanced, but still has a few great stats. The World of Tanks fanbase will not let the 263 just die like this. I know 4 players who plan to quit the game and go play War Thunder because they had 2 marks on their 263s, played em a lot, and also were fans or the T-10. Also, the Obj 263 4s armor borders on stupid, being that its only weak(ish) place is its lower plate, which is itself small, and easy to angle. The new Russian changes have some benefits and attractions - but a few pills that wont go down easily.