Gameplay tactics with the new features.

That's just my opinion. In general, I would like to discuss game tactics here - how to play better, and so on.

If there is any new tactic, it's in TE!
There is indeed something to discuss. But it all depends on the map.
The main change is that before, there was essentially one main hero, and the rest were only auxiliary for chains. Now, the auxiliary heroes have their own tasks: some increase the number of creatures, some transform artifacts, or even the terrain, etc.
The innovations are described in the manual, which is included with TE. And all this weighs about 1 megabyte!