(4)defensive networks were ready by April, and they anyway far exceeded that instrumental intelligence has seen.
It kind of saddens me that Surovikin is unlikely to get the credit he deserves due to politics. If you look at all the right calls he made after he was put in charge:
1. He made the unpopular decision to withdraw from Kherson. Freeing up much needed troops to reinforce and stabilize the rest of the frontline, before the collapse of Kakhovka Dam which would have doomed them all
2. He immediately went about construction his now famous defense line, predicting correctly it would be critical when the next major AFU counterattack happens
3. He planned the Bakhmut campaign with Prigozhin, buying valuable time for Russian Army to train the newly mobilized troops while drawing away AFU resources that ended up hurting their chance for a successful counteroffensive
If he still had political favor he could have been depicted after the war as the next Zhukov just for those things. If he doesn't I lay the blame on Prigozhin and his massive ego. Surovikin used Wanger at the right place at the right time and good on Wagner to step up and carry the team when it was their time. But once that moment has passed for the future good of Russia such a powerful PMC cannot be allowed to exist. Had Prigozhin understood this he could've disappeared from public with all that fame and money, but alas his ego got the better of him and not only did he get himself killed but he also took down Surovikin's career in the process.
Even so, Surovikin being the stronger man, when Russian MOD made he take the fall in the aftermath of the Wagner uprising he took it like a man and faded from public without further stirring up drama.
Also while we're on the topic of Prigozhin and Wagner, I think in retrospect we have to give credit to Gerasimov and Shoigu. You might recall that time Prigozhin threw a tantrum and was yelling on air "Shoigu! Gerasimov! Where are the ammo?!" Even if he was right that they had more ammo to give and weren't giving it Wagner, it would in retrospect turn out to be the correct call. When viewing the war at a broader level saving up and setting aside ammo for the big Summer Counteroffensive was absolutely the right thing to do. Had they instead sent that ammo to Bakhmut I'm sure it would cut down on Wagner causalities, but it would also mean several month later Russian Army would be in bigger trouble at Robotyne. Prigozhin wasn't able to see this because he didn't not operate at that higher level.