Newt realizes that the time left for the country to change course grows short. He must fight his tendency to get into the weeds by dabbling in grandiose ideas and discussions better suited to a faculty lounge than the oval office.
Does his laid out agenda not speak for itself?
None if it will matter without a Republican congress since all repeals and new legislation necessarily begins there. That's why he asks people to be "with him, not for him" because it'll be a hard fought struggle, not something a president can do by fiat.
Will he be, at times, mercurial and frustrating? You betcha. Anyone would be. He could be a very good president or he could be unfocused, aimless and pivot so much he wears out his staff. Romney would be feckless, Newt's at least shown to be a fighter.
Ultimately I'm still of a mind to believe Obama wins reelection regardless of the GOP nominee.