I have owned both, and I don't have any problem with either type as far as accuracy, or cleaning, as both types will have to be cleaned after use. I choose to use an inline simply because I don't want to sit in the rain all day, and get a shot, just to have the water soaked percussion cap, snap. I have tried all kinds of plastic around the cap, and a rubber over the barrel, and all the other things that is supposed to keep them dry. I have also missed several deer because of dampness, using all these techniques. Inlines will go off when you pull the trigger, and so far, I have not had a primer cap that didn't fire the load, rain or no rain.
I use a scope simply because of my eye-sight, and not being able to see my open sights anymore. I don't feel that it makes me any better shooter, than when I was using open sights, but it does enable me to see what I'm shooting at, much better.
The more innovations that are made to a sport, just makes the sport more popular, and lets face it, there are plenty of deer to go around.
Having an inline Vs traditional isn't going to make you a better hunter or a better shooter.