My understanding is that the current version of the SCX-A Bluetooth unit will remain compatible with the new SCX-A v2.0 throttles and SCX-A v2.0 decoders when they enter market later in the year. I believe the only issue with the Bluetooth units is that the very first units in market had slightly low sensor gain. They worked fine with all cars except the rally cars that use the type-B decoder. This decoder sits a bit higher on the underpan leading to a slightly lower ID signal strength. That issue and the correction mod are all documented on the SCX-Advance thread of sfi.7. SCX Advance. Empty. Trying to easily source V2.0 compatible Bluetooth lapcounter.
Hope that helps.