Bear with me, been told i'm slow.
What i meant was, as an example of the "technical factors"?
Reading Kelly's post, maybe i see another way to say it:
Do you mean making a full splice, full length custom cue, then cutting it in (aprox) 1/2?
Then timing the joint so the grain lines up?
I don't think you could cut the maple first, make the shaft and the butt, & expect to have the grain line up later.
However if you made a full size FS cue in one piece (like a house cue but custom) then it could be cut and timed. What i would do, you might or might not find this acceptable: make the bolt 3/8-24 (standard fine thread) on the end that screws into the butt; and it would be a tight fit. There would be a short straight section with flats for a 5/16" wrench. (Alternately: broach a hex in the visible end, for an allen key.) The working end would be a regular 3/8"-10 flat face.
Now you can time the grain to line up by slightly tighening or loosening the differential screw in the butt. And if (when) the cue faces wear or take a set, or if you have to face it again, it will be easy to re-time for alignment. I'd consider saturating each face with very thin super glue before taking the final facing cut.
It will still never be invisible, but maybe close.
Another factor is that without a ferule, the shaft can be weak and crack at the joint if you break with it. Maybe put a phenolic insert inside?
smt