Well, hope you enjoyed your break and welcome back. Myself personally I run the stock 152mm gun and play it more as a second line support assault gun rather then a true sniper. I noticed you don't carry any APCR rounds. That could hurt you in tier 9 battles.
As for your battle, it worked out in the end. Its unfortunate that you ended up stuck watching valley for so long at the start. That kept your top tier gun out of the fight for awhile. On that map from that side I like to take up a position around H4 to fire into the city if I'm in a TD. The fact that the enemy had 5 heavies and your team only had 2 would have made this support position even more valuable. In my SU-152 with the derp gun set up however I would have played more as a heavy support in city.
In conclusion it looks like you don't use a camo net. I'm wondering what your equipment load out is and unless it was a replay bug it appears you commander dose not have 6th sense yet. Had the enemy capitalized stronger on their over match and pushed harder and faster in city or if arty had hit you in that first valley position the ending may have been even closer. In the end it was a win and that's the important thing.