@beelee said:
I'm still not 100% certain what the benefit is. Does this make supportAttachment better ?
The Wolfpack unit is a token unit and has to be removed/replaced. Now the supportAttachment does this automatically. As I said, there is no battle round check, but this is a big step. 
Being able to 'group' supports is something new and needs further testing. Right now, its late so I'm going to bed. 
Cheers...