There's another possibility.
Bob Jewett has been playing for years with a cue that has no ferrule, simply a pad underneath the tip.
Taking a clue from him, when one of my cues developed a cracked ferrule, I decided to cut the ferrule and tenon off and install a pad, in this instance one of those very tough carbon fiber pads used on OB-1 cues, that the OB-1 folks sell for $2, and a milk dud tip on top of the pad.
That shaft is an 11mm shaft, 15 inch pro taper, and it squirts the cue ball way less than you can imagine.
The feel when shooting with it is similar to "sticking" a ball, if you can imagine that. And yes, I do play 9 ball with it, along with the power force follows and power draws that 9 ball sometimes requires.
No problems so far.
Flex