Feather can be very nice, but I've experienced more significant movement/warpage w/ feather crotch American walnut than any other. The worst was a TC grade 870 trap gun I bought new in the middle '70s and shot a lot. I laid it aside for many years, upright in a gun cabinet, pulled it down in the mid 90s to teach a trap shooting class. It felt funny, I didn't seem to hit with it the way I used to, then I examined it critically. It went from slight cast off, to 5/8" cast on. I sent it to Remington, who partially corrected it (bent it, I assume)...then w/in a year, it warped back. I've had the same experience with some other stocks, but none so dramatically. The only common denominator was exhibition feather figured American walnut.
I've come to prefer fiddleback in American walnut, but am more hard over toward juglans regia these days...