Advantages…they are allowed at the venues I fish, when method feeder is banned….figure that one out. Think, also, in deep water tha bait stays in better and reaches the bottom. Also if you’re fishing right tight up to reeds or into snags, you can bury hooklength and hook into the feeder so it doesn’t snag. Also, it’s different to the method and different catches you more fish on a hard water.
All told I’d still choose the method most of the time if I had the chance, but as all bar one of my local venues bans it, I use the pellet feeder most of the time.