VNXE3200 - hot spare policy

We have an operational VNXe3200 with existing storage pools of 2.5" performance SAS drives. I recently installed a  new shelf with 12 NL-SAS high capacity drives, with the intent of creating bulk storage in RAID 6. All hardware is properly recognized. When I try to add the new storage pool under RAID 6, it will not let me create a pool larger than 8+2 which would leave 2 extra drives unused (and wasted). I do NOT want hot spares because this is RAID 6. When I try to select RAID 6 10+2 it displays "not enough disks". HOWEVER, when I click the help button under hot spares policy, it SPECIFICALLY says: "If the system has only 12 disks in total, and they are of the same type, you may configure RAID 6 (10+2) with no hot spare.". So WHY can't I create a RAID6 with 12 disks when I have exactly 12 NL-SAS drives? This is really annoying. Why would the presence of SAS drives of different type affect the hot spare policy of NL SAS drives? How can I get around this so that I don't lose 4 terabytes of space? Why does EMC have to impose artificial restrictions on almost every possible operation within this thing?