We have another developer working on the code updates for BTA who has successfully updated to 0.8.7.5 core. There is also a transition to the v2 of the Bitcoin protocol that needs to happen. On current wallet (core 0.8.6.1) the transition code was disabled.
Before this version is released, testing of the coin transfer, mining and bitcoin v2 protocol transition will be done.
Next upgrade should start soon after the wallet up to date with core 0.10, inline with Litecoin. This helps keeping the wallet up-to-date and easier to apply any updates that occur with Bitcoin or Litecoin.
Once complete we will be ready to implement the Hybrid wallet (POW / POS).