here they are, but i would say all 3 are almost the same
http://www.coh2.org/replays/6819/mentoring-con-ezep115-vs-barsiel-2
http://www.coh2.org/replays/6820/mentoring-con-ezep115-vs-barsiel-3
I'm just going to talk about all three games at once since they are all very similar to each other.
First with
barsiel, in the first game you got a late mg you should aim to have an mg out as your second or third unit and, on bigger maps you can get away with 4th in some cases, but definitely not on small map like langres. Once you got your mg you didn't use it proactively. You basically left it in the middle of the map instead of moving it with your army to win fights.
In the second and third game you got your mg quicker which was good but again you didn't really move it around as much as you could have. once your enemy knows where an mg is you can move it because he in most cases isn't going to just walk right into it and you need to be more worried about flanks. in the second game had you repositioned it to protect your cutoff you would have been able to break out more easily. also on kolodny I would consider trying to take the north instead of the south as Germans it is a lot easier to hold because soviets have a much harder time flanking and it isn't as easy to attack your cutoff.
when you haven't completely taken one side of the map as germans yet and the game is been going on for a while send your engi to back cap the other side of the map he isn't likely to have any units over there and your engi really isn't contributing much to fights anyway. He will be forced to send a conscript over to deal with it and you will have less units to worry about on your side of the map.
You need to work on your teching desions. If your going to go t2 before t3 go at four units or three. Three being to counter early tech four being more of the standard timing. this will allow you to get out an sc to deal with your opponents sc's and you can get a ht to reinforce in the field.
You seemed to move your grens as one unit instead of individually. While it is good to use them in force you only need one to cap a point the rest can move to other points and put on pressure there. infact it can sometimes be a good idea to push your grens to his cutoff and have your engi backcap all the points behind you, combined with an mg you can quickly take over a side of the map and the soviet is left trying to take back his cutoff instead of pressuring yours.
Esep115 for the most part you played pretty well. You did however a few times lose your sc's. Even though it can be tempting to go in and flame everything, it is often better to sit back and you it to flank units you know can't fight back instead of engaging grens. just keep your sc just out of faust range and be carful of rifle nades and just attack at range with it waiting for your opening to go in when there ins't anything to kill your sc.
Your tanks where also a bit late you had pretty much full map control for the entire game but your tanks didn't come out till after 13 minutes every game. If you have that much map control it can be a worth it to go t3 and get a t-70 out to finish off your opponent because chances are even if he gets out a tank it will be late and he won't have fuel for another for a while and you can easily counter it or at least contain it even without an su-85.