Filler seems to be doing just fine playing with CF.It's resistant to minor dings. If you hit one too hard or just the wrong way, it breaks or chips and repairs are not straight forward or guaranteed to work. It probably shouldn't happen if you are careful with your cue, but it can happen. I guess the cue being solid has value if you chuck it in the trunk after playing or play in bars etc. It can also have some value to a pro that has to travel a lot with the cue from humid to dry environments, probably. If you fly from Nevada to the Phillipines then to Germany and China, it's good to know the shaft won't warp.
I'm not a world beater at this game and I never will be. The enjoyment is in the playing, hitting the ball sweetly and getting that great feeling you get when you hit the ball just right and the cue makes that wonderful sound and gives you a nice feel in the hand. The soulless, hollow "thunk" or "plink" from a carbon cue just doesn't deliver that for me. Most people playing carbon tend to use soft tips, to mitigate the horrible feel and sound, and that's just the opposite of what I prefer. The lousy feedback also robs me of information about how I'm hitting the ball as a bad stroke feels no different to a perfect one. I feel it's harder to stay on top of my game with carbon.
Champions win with CF or Wood.
Wood shafts are a lot more work than CF.
CF so easy to maintain.........