My brother has a similar 2017 model with the 2.7 and loves it. Fuel economy is great. Pulls up to 7,000lbs with no trouble.
I have two models with the 3.5 and the 2.7 seems to have nearly as much power with significantly better fuel economy.
It will run just fine on 87 Octane, no need for premium.
I have found that if you want an expert on the troubles with these engines you have to find someone that doesn't own one. The owners seem to be blissfully ignorant of the myriad issues the non-owners report.