Hi Aaron,
my unit is very hot due to being in a drawer with a EX2200-C-12P-2g directly on top :-)
Placed on a table, they are warm but not too hot to be touched.
I wouldn't expect a fanless unit with the mentioned performance specifications to become much cooler with an updated software. The second CPU-core is reserved for forwarding and the flow_octeon process constantly polls the CPU making it rather loaded (as expected) and therefore producing heat :-)