Franklin for a girl?

I have liked the girl name Frankie for awhile because I picture "tomboyish" names as rather cool on girls and women (Scout, Rory, etc.). So, recently I have liked the idea of Franklin on a girl. I then looked up "Franklin for a girl" and was surprised at the comments and general dislike for Franklin on a girl since boy names on girls/gender neutral names are so trendy these days.

So I have two questions....What do you think about Franklin on a girl? And what do you think it takes for a traditional boy name to become widely acceptable as a girl name (think Taylor, Ashley, McKenzie, etc.) ?