I still don't like that trade, but I don't think Scola or Butler will ever be anything great.
Last season there were no options to upgrade other than picking up Elson (which wasn't too much of an upgrade over nothing).
This season there's possibly Udoka, but we'll see. If they go into the season with the current lineup + Mahinmi for Austin they are still the favorites to repeat as far as I'm concerned. That team last year was extremely efficient and gelled into a defensive force. They blew people away in series and in closeout games. They will be the most cohesive team in the NBA on both sides of the ball on opening day with this lineup.