For what its worth I have machetes with both sharpened tips and non sharpened tips and I really can't say there's much utility gained in sharpening or loss of utility in leaving them blunt.
I use machetes to dig often, like every time I sleep on the ground and it doesn't affect their ability to cut because the sweet spot barely gets touched if you do it right. If it was blunt in the first place it is a moot point. If the point was sharpened digging will dull the edge on that forward part of the curve but, it just doesn't matter.
On my "personal 16 inch Tramontina", the one I don't loan to other people, the tip is sharpened and it has a slight false edge on the spine at the point. I do that to make the machete a better weapon, it has nothing to do with bushcraft. The Latin pattern Tramontinas will penetrate on a thrust if set up like this.
On my long working machetes, the ones I loan out to people for clearing land, I do very little to them other than giving them a file sharp edge. These blades get so beat up it would be depressing to spend any time on them. Often I end up putting them in a vice edge up, filing the edge off as in totally removing it, and refiling a totally new edge with no chips or rolls in it. Getting fancy with such a working blade, convexing it, putting the scandi edge near the base, etc would be a waste of time. I will say that on a long blade used for cutting tall grass that sharpening them to the point does seem to make the work go easier, but I'm not going to spend too much time on a blade that will eventually chop a cinder block or standing re-bar.
The mods I put on my bushcraft machetes are well documented here. Its just a matter of what you plan to do with your blade and how much time you want to spend doing it and maintaining it in the field. Having a sharp point is what most machetes lack but I also always carry either a folder or a Mora. If the machete was my only blade I would sharpen the tip, it certainly doesn't detract from the utility of the blade. Mac
