What concerns me about the new mix of enemies seen in Beta is that many of the Encounters feature several or even all five enemy types. The old system, typically one only had to deal with a maximum of 3 enemy categories, which made choosing your army much easier.
We all know that the Barracks troops are 'generalists' - equally effective against two types of enemy. The Merc Camp and Training Grounds troops are 'specialists' - very good against one of the two possible enemies, and weak against the other.
It appears to me that having every fight featuring so many enemy types, it makes using the advanced troop types more difficult or even impractical, so for many Encounters I have reverted to Barracks Troops which have fewer losses on AutoFight.
This at a time when they have given us the ability to train in all three buildings simultaneously - so we can make plenty and plenty of 'advanced' troops - which we are less likely to be able to use.
In the current tournament, most of the Encounters needed a mixture of Golems and Archers, and it was difficult to use the 'advanced' troops on AutoFight, because they were likely to get slaughtered.
I wonder if the developers considered this?