Im seeing balance point coming into play more than anything. Some people like the way a forward weighted cue feels, you can easily obtain that with a 2inch shaft extension, problem here is if the joints are not faced up correctly you can have a pretty nasty looking wobble. Some people are taller than 6 foot and tend to be gripping far back on the cue, you can remove the weight bolt put and extension on and call it a day. Also if you can get use to playing with a longer cue ( either way butt or shaft extension ) there tends to be less shots you have to struggle with as far as reach goes. Butt there are a ton of Balance point and weight shifting technicalities that can make the player like the cue more with either type extension, all I can say is try it out you'd be surprised how much it broadens the mind into realizing you can make a cue truly play like a tool specifically for you.