As I've said in the rest of the post that you skipped, Clark can still be somewhat of an act. But dial it down. There can still be a bit of clumsiness, but not to the point that you'll always want to avoid him at all cost. Instead of making him a mumbling idiot and withdrawn, make him a Mr. Knowitall, a smarty pants, correcting spelling, annoying Lois with worldly facts, etc. Try to breath some freaking life into the character instead of having him fly below the radar 24/7. He works for the Daily Planet and got a desk near Lois Lane the ace reporter. Show how he earns his keep, let him find some major scoop, show that he could be Lois rival, make him a character that can be taken seriously.