I don't really see a benefit for a 14+ owner to convert to the 10-13 front end besides for the novelty of the elusive OG Trail Edition. I for one would not want to "downgrade" headlights, have to retrofit, or buy aftermarket ones just to get the OG look. I personally retrofitted my headlights, which I think was one of the best upgrades I did to the truck besides regearing. Alpharex and Sypder only recently released aftermarket headlights for 10-13, but they really update the front end of the truck IMO. I personally would love to save some weight and money by doing the "viper cut" with the lo-pro bumper rather than go full blown front bumper to increase approach angle and run bigger tires. I also think the Trail Edition roof rack may be difficult to find nowadays (in decent shape).
But there's a reason I bought a used 2013 instead of a 14+...