The best thing you can do is satisfy all user expectations, including the ones they do not know they have. People love being positively surprised. So the propos

The best thing you can do is satisfy all user expectations, including the ones they do not know they have. People love being positively surprised. So the proposition is this: By the model of your partner, you create expectations for users, and then satisfy them. This essentially means people get excited about something, wait for it, and, at best, it eventually happens. So they think "Yeah, it's finally here.". Your proposition is to keep all that but also have them think "Yeah, it's finally here, and it's even BETTER than I thought it would be!". This is distinct from surprise releases and no release schedules, which I suppose is what your partner is thinking about. Raising client expectations is an excellent idea. Exceeding those new expectations is even more excellent. Promise something good. Deliver something better.