Phemox:
Please stay on-topic! You can make a new thread for "changing forum rules".

Ferriswolf:
Yes, they have many improvements like polygonal collision detection and new terrain system.
They also have a foliage replicator. This is some kind of geometry instancing. But I don't know about its performance. But the new game "Legion.." from GarageGames will tell us.

I rendered a few of my models today in TGEA 1.7 and it works fine. Shaders are easy to setup, just a few lines in the material file. The engine writes the needed HLSL code then automatically from the info you provided in the material file.

The documentation is better than before. But there is still room for improvement in my humble opinion.
Workflow is not perfect but the result is quite good. It looks professional to me.

Scripts are easy to read. I don't know the engine source code so far.