Miscues happen 10x more often because of a poor stroke...rather than what tip is on the cue, or the tip size, or the tip hardness, or the tip curvature, or, or, or.
Scott Lee
http://poolknowledge.com
Very true... it is and will always be the stroke/mechanics/focus including chalking and knowing your limitations outside of center.
However, if I couldn't play unless I had to always have a perfect stroke, someone would have needed to take away my belt and shoe laces long ago.
That said, in response to the OP, in my experience with the Revo shaft, miscues were more likely with a dime radius, followed (at a distance) by tip hardness.
Yes, there is certainly a direct relationship to forgiveness in a less than perfect stroke situation.
My experiments (2 shafts, 6 different tips i.e. 3 per shaft) were for the purpose of choosing what tip and shape I personally wanted to use.
I was purposely moving out from center and consistently shooting a 3 to 4 ring of english. 99.5% of the time I would never want to exceed a 3 ring but I want to be comfortable if/when I feel the need.
For me getting into the Very Soft or Super Soft range had too little contact response or just felt... well soft. Going beyond Medium counteracted with the already stiffer feel of the shaft.
In each case I tried a dime and nickel shape radius. I opted for Soft (currently SIB) but I do my own cue maintenance so I'm not concerned with replacements.
If I were concerned about who/when to get a tip replaced, I'd be fine with a Medium tip....no compromising on the nickel radius though....(of course IMO).