Just so, aye. Blessing in that they succeeded where even the C'Tan failed and possibly beat Chaos forever, but a curse in that the Imperium *needs* the warp to move around the galaxy. And yeah, but it'd likely make the Imperium stronger, since they'll *have* to abolish their stances on technology and advancement in general if they hope to survive at all whilst their empire falls to other factions across the stars because of the lack of reinforcements and other aid.

considering that he seals the eye, he did the imperium a blessing and possibly a curse. nids are still a problem, and a possible second age of strife is gonna happen