The changes are a little on the iffy side, while the Nydus Worm alone is awesome, having a "build time" is what's troubling to me. Overlord's could be destroyed pretty fast if a good defense is in play by another player/computer and expect you to be coming in from the air.
Unless you can find a close enough spot to the enemy base without having the overlord caught/destroyed, it'd make the element of surprise useless because of the time to build it. If anything it would be instantly created, if it's being cast out in a way like a spell from the Overlord, that idea may or may not work well depending on Mana cost as well. Would need to try it out before I can see if the change is worth it or not
Adding to the recent Blizzcon changes, Karune has set up a Poll to gather feedback on the latest iteration of the Nydus Worm.
Blizzard Quote: (Source)
Zerg Nydus Worm
The Nydus Worm is a unit that has undergone several changes since its unveiling and we are curious to the feedback on the latest round of changes shown at BlizzCon.
For those who do not know, the Nydus Worm is a tunnel opening to a network in which you can store your army. When the Nydus Worm springs from the ground, it can allow that whole army to start pouring out from that position as seen here: http://starcraft2.com/screenshot.xml?s=84
Nydus Worm prior to BlizzCon
Prior to BlizzCon, the Nydus Worm had to be summoned from the Nydus Canal, and only on creep. Thus, in order to do a drop, an Overlord was usually needed to drop creep, and then the Nydus Canal could spawn a Nydus Worm at that position. Also, because of the cooldown, typically for a mass drop, a Zerg player would need multiple Nydus Canals, to spawn multiple Nydus Worms at the drop position, to make sure the enemy couldn't easily destroy the Nydus Worms before the Zerg army could come out.
