The main problem with the 4+X NA2 Fireteams is that you can't reform them after they lost one guy and the Link broke. You'll pretty much have to include the Haris Profiles to reform the former Core into a Haris in case the leader drops etc.
This is why I'm liking the Keisotsu team. It's defensive team. so I hide away the link leader in the back and everyone else does the shooting!
@ijw Can you please address this? Ikari no longer have access to the Druze Haris profile in Army - but Haris is a valid link option for them per the PDF, Treason Book and Wiki entry http://infinitythewiki.com/en/List_of_Fireteams#Ikari_Company
ijw said in another post that he flagged this discrepancy for CB's attention. Hopefully they get on this sooner rather than later.
Ta, I just saw Space Ranger resurrect this thread and remember hearing some chatter about it - so took a look.