About the unit reward: It showed up and I had 3 buttons to choose one of the unlocks. It just was not possible to press them. Like I clicked and nothing happened.
I think the teasing did not work that well for me. I did not know that the archer was locked and i kept waiting for it.
I know it is way harder than it seems at first to get the feeling right. You have a cool new mechanic with the trading thing but the downside is it is not so easy to make it fit in with the “traditional” auto battler gameplay loop. I still think you are on the right track here so keep improving it ! 😊