I once shot an antelope using a 2 blade head with the factory,needle tip and the tip curled,drastically affecting penetration.I was very lucky to be able to stalk within range and get a second arrow in him.That was a hard lesson and I have never hunted with a tip like that again.
We used to clip the points off Bear Razorheads but I didn't like it because you couldn't spin the arrow to check alignment.I always like to check alignment after shooting any broadhead arrow.For that reason,I had stopped clipping them and it caused a situation with that antelope.A big mistake on my part and I want no repeats of that.
Anyway,these days I would use a tanto tip on any 2 or 4 blade and if I ever switch to 3 blades,I'm sure I would file a small pyramid,just to be safe.
I like to use a tip alignment jig to get my broadhead perfectly aligned before I do any tip filing.Then after filing on the tip,I check it again on the jig to make sure I didn't file it off center.
A curled tip not only can drastically affect arrow penetration,it can steer it off course.Either one of those things can cause serious issues and it is easily prevented.