1. Fans are idling until you reach ~90-95C on your CPU and then slowly increase in speed to keep CPU temp constant. Hence a lot of heat. It was like that for all MacBooks for a decade. Not really big news.
2. To change that you need to install Macs Fan Control or a similar fan control software
3. It's not dGPU either
4. 2016 models have more efficient cooling system – a) better heat transfer from CPU to heatsink, b) better heat transfer from heatsink to air. But if you keep CPU temperature constant (like default curves do) it'll result in a warmer heatsink / enclosure / exhaust airflow because it'll be able to keep fans idling @ higher load. Higher load means more TDP and more heat generated by your computer.
5. If you change your fan control curves to proper ones, you'll notice that the new laptops are actually cooler than predecessors.
Here's a screenshot of 100% cpu load through terminal. It was barely enough to even speed up the fans to the max.