Day Dreamer,
I dropped one last weekend and stuck it in a dry, dead hardwood limb about 2 inches in diameter. How it managed to hit it is beyond me, but it stuck straight up. The tip was about 1/4 inch into the limb. I pulled it out and it's still nice and pointy. The only one I have with a pyramid tip is the one I stuck in the blandex. All the ones that have hit critters or foam targets are still pointy. I agree with the "If it ain't broke, don't fix it" idea too, which is why I leave them pointy.
I figure the Wenzels had a reason for the design. Who am I to argue with them?
By the way. I don't seem to have all that much trouble sharpening WW's. Just start with a file and work them down flat. Then lighten the strokes until you are putting barely any pressure on them. They will be scary sharp! I use a medium diamond stone for quick touchups, but don't take all the burr off. That keeps them cutting. The hole they leave on the far side is really nasty! Talk about a blood trail!