What would I change in a reboot? So ****ing much. I love the show and all, but there were so damn many missteps along the way...
1. Seven seasons. Seven is a good number. Let's face facts here, the series was essentially just taking Clark from point A to point B. It should not have taken ten years to get from point A to point B. That's a whole lot of filler.
2. Michael Rosenbaum from beginning to end. Another downside of them taking so long to reach the end. The series was just as much about Lex's descent into villainy as it was about Clark's journey towards becoming Superman.
3. Don't use Lana as the reason Lex turns against Clark. Just ****ing don't.
4. Lana would not last far beyond the high school years. She got tedious by about season five. Change the entire arc of her relationship with Clark. Season one would've been the Whitney/Clark/Lana triangle (let's just change Whitney into Pete Ross, just for the sake of avoiding much product placement), season two would've been Lana and Clark dating, ending the season with Clark telling Lana his secret; season three would've been her dealing with being a part of Clark's life and season four would've ended with Lana leaving Smallville behind. Eight seasons work done in four WITHOUT forcing the two apart at gunpoint or delving into a ****ty Lex/Lana romance.
5. No witch arc, no Doomsday arc, and (as much as I enjoyed him) an entire season of Zod and the Kandorians was not necessary.
6. Dont wait until season five to delve into any real Superman mythos or give us any legit villains. But I loved Marsters' Brainiac, so solution: Instead of Professor Milton Fine in season five, how about Principal Milton Fine in season one and have him serve as an overarching antagonist for the high school years, just as Lex is the overarching villain for the series.
7. The Legion much earlier in the game. I loved their episode, but really, the second they showed up, their first reaction should've been "Mother****er, why are you not Superman yet?!"
8. No Tights, fine, but give us some flights. I get why they wouldn't want Welling running around in the Superman costume episode after episode for potentially many years, but I see no reason that this guy shouldn't have been flying by, like, season eight.
I can think of more, but I'm too lazy right now. Maybe later.