I think Spelling went the Lara Flynn Boyle route with one too many trips to the plastic surgeon. She looks nothing like she used to on 90210 (which she was on for ten years so you know what she's SUPPOSED TO look like now).
As for the episode, the synopsis got me to watch it, but the bad writing, the bad acting (though Durance was the standout performance of the episode), the stupid stock Smallville law enforcement, the stupid stock Smallville journalists, the stupid stock Smallville civilians, the time travel, the reset button -- it was all auto-pilot business as usual.
Also, what's with the Heroes syndrome where the person who knows the secret won't blab it to the world? Conceivably, you could do this exact episode for multiple consecutive seasons with bringing back every bad guy who knows Clark's secret who wasn't killed.
I think there's a lot that could be done with the Smallville format, probably nothing great, but at least shooting for a high-level apartment with a view instead of being content with the basement would go a long way. Though I wonder if the show would've lasted as long as it did if it were smarter, and if it weren't for being on the CW.