After the Hoi4 update, I would like to ask for some help and explanation about the new army system and how can I use it properly. Thanks! Hope you help me! 
I found that the new system pretty much breaks independent panzerkorps. I have to put them into a separate armygroup in order to pull off the kind of independent encirclements one might normally do under the old system.I can't stop my panzer army from spreading themselves out over the army group front. Do i have to take them out of the army group in order for the AI to leave them alone?