I think @DG Rider Brought up the two most important things. The shocks and the lack of O2 sensor. If your friend is just wanting to putt around and use this as a hunting/Farm /work rig and he’s at a relatively low altitude then the machine is fine as is. If he wants to do more trail riding or is at a high altitude (over 6000 feet) he may be disappointed in the engine power and front suspension.
There were a few 2014’s that had baffles in the muffler break off and block the exhaust. I wouldn’t be too worried about it but it is worth mentioning.
As for electrical connections on an older rig I wouldn’t worry about that one bit. My 2014 700-2 is about to turn over 7000 miles and in that time it has been pressure washed, driven through water, mud, and used for irrigating. Not one issue. Those sealed connections really work!
Every shortcoming of the 2014 model year can be fixed for the most part with aftermarket parts. You can get a Dobeck AFR plus to add an O2 sensor, Fox to fix the suspension, HMF or Yoshimura to fix exhaust, and superatv for power steering.
The PS is really not completely necessary, more of a luxury upgrade. Don’t get me wrong, I shelled out the money for it and I like it. But don’t let the lack of power steering scare you off, it’s not that bad without.