Do you mean the amount of "old skool" 90's techno influence was minimal, or it was old skool 90's minimal techno? (sorry, just to clarify, cos if you meant the former, I'd be inclined to say that the amount of old skool rave influence was fairly outstanding. If you meant the latter, I'm not hearing any minimal techno at all... )
Also, another UK artist with a recent album release well worth mentioning is Mistabishi, of Hospital Records. His debut album Drop was great (reaching #2 on the iTunes download chart behind The Prodigy). Really fresh drum & bass and dubstep, highly recommended.
I think it's the hook in Invaders Must Die. It's terrible, as are the vocals on Thunder for that matter. I'd argue that these are the weakest points of the album. Basically in reiteration of my previous post I'm fairly ambivalent about this album. Omen (the Noisia remix in particular) and Warrior's Dance were really enjoyable. All in all though, I'm happy that The Prodigy are back.