Agreed, it was like the were editing the movie the realized they hadn't put any action in so in a desperate effort the crammed the last 20 min with all the plot/action and then walked away.
I haven't seen it, yet. I do have a soft spot for Will Smith and I shall be voting for him in the 2016 presidential election...but I have to say I'm a big fan of Heston's The Omega Man, a classic.