I wouldn't play with her at all when she wakes up in the night. I think the less interaction the better, otherwise she might start waking up and barking for you just because she wants to play. I used to just let mine out of their crates, walk to the back door, let them out, praise them for doing a wee, call them back in and point to the crate. I think you have to be clear that you will get up in the night for them to go to the loo or if they are ill but that is all.
Sounds like Brodie is doing really well. I like your plan not to give treats for everything. It's good if you can get them to do things for praise rather than food all the time.