Quote Originally Posted by drhawk View Post
Perhaps some people don't care about the extra key (normal version reward) and satisfied with getting 3 keys + free cape (+ version reward).

Actually, tying up TWO armor slots for 2/3 weeks to get one key may not be the best decision for some.
It sounds like you and I read the banner the same. If you have the plus versions, the normals should not matter if you do not want the normal rewards. However, if 3 keys is worth the effort, it seems like the extra one would be too.

Also, despite the way you or I understand the banner, The Wise One's post in the Beast Brawl announcement reads this way,

"[Boss Collection] Beast Brawl I
Attention Knights!

Defeat both Beast bosses and craft their respective Boss armors to earn Limited Edition Rewards! Craft and Keep the Boss armors in your possession to redeem the rewards during the redemption period.

CRAFT AND KEEP ALL ARMORS (REGULAR AND + VERSIONS) IN YOUR INVENTORY UNTIL YOU GET YOUR REWARD"

Because he is specific about keeping all armors regular and +, I'd play it safe if it was me.