Lots of replies here, but here is my 2 cents. I do foil, mainly because i want to ensure a nice color and also, I don't use a lot of sugars in my main rub so then I can add a little sweetness with brown sugar in my foil. As others have mentioned, it sounds like the ribs just may be a bit overcooked. A few tips if you want to foil...
- 3-2-1 is a guideline for ribs, but by no means science. Smoke until you get the color you want then wrap. I check mine at 2.5 hours.
- If you do foil, let them sit in the foil for 1.5 hours then check them. Open up a rack real quick and give a bone a gentle tug. If it feels like it is about ready to come out, you are done with the wrapping portion.
- Unwrap and put back on smoker for about an hour or so. This will help the ribs tighten back up and you can glaze from there and pull off.