I'm still at the beginner level, and I'm waiting for the new Intermediate lessons to become available.
I've had a look at the Lower Intermediate lessons, and a lot of it looks like it revolves around, friends, getting a date and things like that.
I'm not sure which level you'd fit these lessons into (and apologies if you've already covered them) but it would be nice if we had lessons on giving an opinion and discussing something slightly more complex. They could discuss a short article they've read in the paper or something.
I'd also like to see one that focuses on emotional traits. Like that person is funny/sarcastic/thoughtful/chic/suspicious/trusting/selfish/kind....words like that.
You could also do one about cooking, where people would learn vocab such as -