The second Game (Invisible war) was complete and utter **** in terms of:
a. Gameplay - was very slow and sluggish even with mouse sensitivity set to full and the augments did little or nothing to improve matters and the AI was a joke and hardly posed a challenge even on the higher difficulties.
b. Storyline - Super powerful information controlling AI merges with nano-aug and suddenly cannot control the information flow and crashes plunging the world into collapse...

then to repair instead of just modifying the original nano augs tech they have to grow a completely new one how efficiant!

x 2
c. Length not even 1/8th the length of the original all side q's included.
It should never have been released and never deserved to be counted as part of the Deus Ex series IMHO. HR on the otherhand was more true to the original The story was fantastic the gameplay just as good the only thing that this lacked over the original is the length I mean it was by far longer than DE: IW but still only about 1/3 the length of the original.