He grew up on a farm and thought of himself as Clark. The latter is a significant departure, isn't it?
Agreed. It wasn't your dad's Superman because five years later, he was still butting heads with authority. When was Superman a rebel and well known superhero simultaneously? Why would he be? Why have him brood about Lois dating someone else instead of being in love with superheroics or in a love triangle for two?
On one hand following Morrison and mimicking the flavor is vintage Lobdell. But his "gonzo" approach was quite similar to what Bates and Maggin were doing after O'Neil.Now Morrison I can believe was going for a Golden Age Pre-War take. But if you are going to try to convince me that Scott Lodbell was purposefully trying to call back to pre-Crisis, I really will need to see some receipts for that claim.
I think it really startwd with Schultz directly having Superman come to see himself as Kal El just before Loeb started, but that's nitpicking if only to slight Berganza and his leadership. Same with Clark and the reboot Legion. The power creep, well, his powers always manifested at a young age and expanded after his death but DC clearly wanted the New Superman to hit the ground running so while he wasn't all powerful from the jump, he was nearer to pre crisis much sooner.
The rebel thing I can give Johns for... although his fellow pre crisis foremost fan Waid did do the xenophobia earlier in his own origin. But I think Johns is why it stuck more than any general attempt to go retro, as I guess I said above.