I will have to respectfully agree that knocking the sharpness down ona Muzzy point does sound stupid!
Seriously, that makes no sense, you want it sharp as can be for big fish. When you get into truly big buffs and carp, penetration is an issue. A couple of tricks for Muzzy's on huge fish I have learned...
1. Take some pliers and squeeze the barbs in towards the shaft so they don't flare out so wide. Makes a smaller entry hole, but the barbs still have the same holding power when they fold out.
2. Use the "gar" tip. They cut the scales better than punching thru them. I finally figured this one out when every time I would loose a giant, I would have a big scale wedged on the "carp" tip that I couldn't get off without pliers. Seldom happens with the gar tip.
Also, it is important to keep some pressure on the fish at all times. IMO, when you give the fish slack, bad things happen.