Hi Nick,
The S332 is supported by the point releases after the release of the X.0 release of the SDK. So for instance, SDK 14.0 did not support the S332, but versions 14.1 and 14.2 did. This should be a similar case for SDK 15.X.
There have been technical workshops given at the ANT Symposium discussing the implications of sharing radio time between ANT and BLE, but those presentations haven't been posted online yet. I'll see if someone can look into that, but if you'd like more information right away, please contact the support e-mail asking for this information and it can be sent directly.
Cheers