If a few have to lose limbs so I can have the PM and RR back in action I say it is worth the sacrafice! Seriously, they could solve any and all of the safety issues with the redesign and now that they know what to avoid from past experiences there is no reason why any new attraction can't be as safe as possible.
When you lose a limb on a theme park ride it always sneaks up on you, nobody ever sees that one coming.