Yeah, a spool is predictable...
My feeling for IFS is that a locker is needed for rock crawling to prevent blowing up CV axles but the other compromises didn't fit our use. But we haven't done much harder stuff since 2008 on the Rubicon, that trip got any remaining need to seek-and-destroy with the truck out of our system.
"Silent enim leges inter arma." -- Cicero