I agree...it does work...i have made some custom fields mid-career...and the AI uses my custom fields..
thanks for this input...
I have noticed that in t20s (since career mode is mostly t20s), the AI during powerplay uses only aggresive and balanced fields (short form) and after powerplay the AI only uses attacking and balanced fields (short form).. So basically i have created a lot of defensive fields and the labelled them as aggressive, balanced or attacking...Amazingly the AI uses my custom fields...though the AI also uses default fields...i know the default fields cannot be deleted but it would be nice if we could maybe lock some default fields so the AI does not use them...i dont know if its possible but its just a thought...