Draining is a supportive care measure and I would only drain a hen that is showing signs of distress from the fluid - difficulty breathing/walking, lethargy, etc.
If the fluid is lessening on its own, then she's reabsorbing some of it and passing it on out.
Your goals are more focused on production and efficiency (rising feed costs!!!)fd, so if she's not able to resume laying, then culling/processing for food would be a practical approach. This is something to consider doing.
Can you post a photo of the natural stuff that you purchased for deworming? I'd be see what product(s) are on the market and how it's labeled.
I don't know of any natural remedy that will rid poultry of worms. Using an anthelmintic like Fenbendazole (Safeguard) or Albendazole (Valbazen) will be more effective and get rid of most worms that poultry can have except for Tapeworm, which requires a different dewormer.
You could show your Hubs the photos in this article and ask him if the odd egg was similar to the photos. If so, then it may help confirm/rule out your suspicions of Salpingitis and help you make some decisions about what to do with her.
https://the-chicken-chick.com/salpingitis-lash-eggs-in-backyard/
