Very small sample size, tests done on fortifications, and had to count out my hits because of xbox lol.
Without feather step:
195 normal hits
54 critical hits
249 total -> 21.6% crit hit rate
With level 5 feather step:
212 normal hits
80 critical hits
292 total -> 27.3% crit hit rate
I understand that is is a small sample size and doesn't really mean much, but no one is talking about it.