Even if a redesign was coming out, you'd be best waiting at-least an additional full model year before signing on that line. Too many bugs to work out typically in the first model year of a big change. And many times the 2nd model year is only marginally better. So if you are ok waiting 2-3 more years then skip it.
But do some searching around this site. The next incarnation of Pathfinder is potentially (or maybe for sure) going to be of uni-body construction as opposed to the body on frame that it is now. Depending on your requirements this may or may not matter to you.