For me, the Redemption standalone will depend on price, and extra content.
I paid £6 for BOBW and was more than happy with the additional content. If Redemption offers up another retrospective and another commentary track, and I can snap it up for £10 or less then I'll be picking it up. If the price is >£10 then I'll just wait until it's not. If I deem the extras not worth it, then I simply won't bother.
Plus it saves waiting a few more months to finish watching Redemption!