Discussions, post-mortems, analysis, inflated egos, and all that jazz.

Why was it renamed to Dnipro, and not back to Yekaterinoslav? I'm not sure.

Is this a provocative question? This option was never even considered. Dnipro was chosen as a compromise, nothing more.
And in general, no one ever fully pronounced the name Dnepropetrovsk, except perhaps when a foreigner asked where you were from. Everyone always said Dnipro, as far as I remember.

Added 16 minutes later

...a billion people personally shot by Stalin...

Of course, it wasn't Stalin who personally shot them, and it wasn't a billion. And it wasn't Stalin who wrote millions of denunciations either. All the repressions were aimed at suppressing thinking people who didn't want to live in a world that didn't exist. And he succeeded, I must say.
The problem isn't coming to power by any means, the problem is holding onto it afterwards if it's an authoritarian regime. Giving up power means putting your head on the block for the new regime for your current crimes. That's how systems are born, but not out of thin air, but on fertile ground. And in the case of Russia, the return to the USSR is not just a coincidence; it's one way for the current ruling elite to stay in power. They don't care about this USSR; they're just using it. But the mourners are in a wild ecstasy. They'll live for a few more generations, waiting for a miracle.