Some additional items would be very useful such as:
Disk IOPS
Disk Read Max Throughput
Disk Write Max Throughput
Number of Internal IPs
CPU Affinity options (pin to X number of cores)
Boot Order (option to boot from ISO or Hard Disk first)
Number of IPv6 Subnets
Also, the ability to increase both disk space and Swap RAM together if Swap RAM and Guaranteed RAM are pinned.