Before the patch I got opponents with several different armors. After the patch I always get the opponent wearing the exact same armor . Not sure if this bug affects every character, but I noticed this with Raider. Plus, always with Raider, if you change opponent quickly you'll always get male opponents (if you choose Raider as your opponent you can get a male or female Raider, but if you click on change enemy you'll get only male enemies).
Can we just choose to use our own heroes as opponents in Training mode?
Nope. When selecting the Raider as my opponent I always get the exact same Raider, with the exact same armor, while before I could get Raiders with different armors. Plus if I change my opponent quickly I get Raiders with different armors, but only male Raiders.
Before the patch I could get 4-5 Raiders with different armors, but the ''only male Raider when changing the opponent quickly'' was still here. I tried with other Heroes, like Gladiator and Black Prior, and didn't saw any bugs.