Hi Ulf,
the choice of support elements concerns only the first scenario of each ToO or Chapter.
This way you may put at the start of a ToO or Chapter the choice of support elements (its up to you but the best is to put one at the start of the ToO.
Soon the Beta will be available and you will see all these things.
From the Alpha stage, I can say that the game is very nice and with these new elements it has a unique blend.
The strong points are the following :
1. Interactive support assets
2. Many low probability enemy reinforcements that make the game unpredictable and gives a very high replayability
3. Interactive point allocation depending the victory level of the player
I think that in 3-4 days I will post th beta of ToO No1 chapter No1. For the moment, all I can say is that the campaign is unique.
cheers,
Pyros