Lilli, I'm sorry that the pellets on the ground never worked for you. One thing a feeding station might be better for is that there can be a lot of pellets in one place, so it might be easier for the slugs to satisfy their appetite as compared to single pellets on the ground. The feeding stations only have one opening as well, so would probably be likely to spend some time in there and eat more pellets. If the slug is still hungry it would have all the more reason to continue to the nearest plant. However that is speculation on my part.
Burgundy snails are beautiful, but unfortunately not harmless here as they can do great damage, particularly to dahlias.
Do let us know how your new beer traps work out!