Tried not to make the title too spoilery... we know he'll get a new synth body, and a preview picture shows what it'll look like:
I really like the way he looked in S3 and the beginning of S4, but this look has something fabulous and impressive about it. Maybe he'll change from being shy and cute to being more self-confident and proud when he has the body he's happy with. This could be much more interesting than the anomaly...

I really like the way he looked in S3 and the beginning of S4, but this look has something fabulous and impressive about it. Maybe he'll change from being shy and cute to being more self-confident and proud when he has the body he's happy with. This could be much more interesting than the anomaly...