User blog comment:Garhdo/Extended Cut - opinions?/@comment-99.236.226.219-20120627231540/@comment-4310096-20120628112208

One could argue, that the scene now explains why Harbinger just leaves the site after he blew the Hammer force to hell. He's dealt with the immediate threat of the ground forces reaching the Conduit (which, in context is more important than the Normandy, because Hammer reaching the Conduit means, that the Reapers are in huge danger of losing) and can now chase after the Normandy.