You are perhaps making too many assumptions. I have gone through those patches of feeling like my WAW has lost all feelings for me on a periodic basis. But then we are still here two years later hanging by a few threads. And I know for sure that her feelings are not gone. So, from my experience, things ebb and flow. Your feeling that GAL activities need to be ratcheted up makes perfect sense.
UD
The 3 laws of DBing:
1. PMA is critical to DBing.
2. Since drop in WAW's PMA leads to drop in LBS's PMA and vice-versa detachment is critical.
3. Validate to raise WAW's PMA and GAL to raise LBS's.