I foot my Gold Tips on the point end only and have never had a problem.
I do a ton of stump shooting and small game hunting so arrows bouncing off rocks, hard living trees, etc are just a reality for how I use my bow which is why I went with footed carbons to begin with. I simply use broadheads/blunts/field points that are the same outside diameter as my footings so that after the hole is punched the shaft can just slip right in. I've never noticed any decrease in penetration from the 1.8" footings on my shafts. Also, I've not yet experienced the need for a footing/collar on the nock side of the shaft but have had a couple nocks blown out on a hard impact. To date the only arrow I've damaged was at a shoot and I pulled the shot really bad; it went through one side of a steel pipe and dented the back side of the pipe. The insert was driven about halfway behind my footing and thus my shaft was ruined but I sincerely don't think any arrow would have survived that one.