I always thought that Second Season was much better. They had much more action and mystery. First Season episodes were just ok. Episodes by Glenn Leopold, Lance Falk, and Michael Ryan are much better. Glenn Leopold wrote 3 episodes in first season - Ezekiel Rage, Future Rage, and Rage's Burning Wheel (Created Story With Michael Ryan). I consider them as strongest episodes in First Season.
I also liked Jessie better in Second Season. Jessie is used more in Second Season. There were only few weak episodes in Second Season. Peter Lawrence's pace of the script is too slow.