I'm bout the same time away from treatment as you and have many of the same problems.

I've found some dry mouth relief using the Biotene Oragel product at night before retiring. Have also been trying to teach myself to sleep with my mouth closed. I still keep some water at bedside for emergencies.

Try milk instead of water with your meals. I found it does a better job of coating than water. Some foods just don't work for me yet. Pork is one. Gravey or a sauce does help it go down.

Fruits taste odd to me too.

I can taste sugar, but have a limited sense of salty and bitter.

I'd say my biggest issue is that I have to chew so thoroughly now that I get tired of eating, especially with company.

Stay on top of the dental stuff. If you're not seeing a dentist with an oncology background it would be a good idea to do so.