Last Tuesday, team Kaels finally downed that big meanie Malkorok on heroic mode. We were unable to do any more raiding after Tuesday, but we did get a few pulls in on Heroic Spoils. Apparently that practice worked, because tonight, on our first full evening of work on this encounter, we defeated it. (Last pull magic, ftw.) Other than increased NPC health and damage output, the main difference between Normal and Heroic is that every time an NPC from a small box is opened, an add spawns in the other side. This add must be quickly killed, or it explodes and probably wipes the raid.
One note: Team Kaels is likely now finished with progression for the expansion. Only a couple more weeks before patch 6.0 is released and given it is highly unlikely we have enough raid time to get Heroic Garrosh, we thought we'd call it here. From here on out, we will be trying to kill Garrosh as many times as possible to get folks their heirloom weapons before the next expansion. :)
Edit: I realize everyone has quit already given SoO has been out over a year, but I still think this is a fun way to end the expansion: