I have a Pink Wampee. Last summer it was about 8ft tall and wind snapped the trunk about 6in from the soil line However the tiny (1/2in or so) strip of bark remained attached and the whole top-broken tree still looked fine all summer, laying horizontally in my kids sandbox. It put out new growth near the break and I selected some nicely spaced branches, put small spreaders on them, and now my Pink Wampee is a beautiful bush about 2/3 its original height but twice as wide.
What I'm getting at is... I think it will be fine even if you decide to give it a severe pruning. They appear quite resilient.
I don't have a current picture but trust me it made a full recovery
I am also curious how long to fruit for these... after I bought it I read some reports that the fruit isn't very good tasting and so I have been thinking about ditching it... but if it is likely to fruit soon I will hold out to try it.