That type of batrep puts it into perspective... Regardless of it being over- or underpowered, an all Obelisks army didn't play like a Necron army.
The Pylon seemed as underwhelming as the Shadowsword.

How did you like the new range? Did you find less targets because of it or did intervening terrain preclude the distance shots regardless?
It appears that the deciding factors for the game were:
Maneuverability of the Obs to generate cross-fires and main tactical positions
Those same Obs re-deploying en masse via the teleport function
Shadowsword blowing chunks
Position of the objectives relative the deployment
Would you agree?
IMO none of those things really strike me as overpowered in-and-of themselves, but the synergy of the units strengths combined with those factors brought the win.
I do disagree, however, that the teleporting off is too much of an advantage. Many a game I have played where it came down to points and I lost because of formations off-board. Also this ability to leave and re-deploy is as important to the army as the Necron warriors themselves. Mitigate it anymore and you'll end up with something un-Necron like.

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author of Syncing Forward and other stories...It's a dog-eat-dog world, and I've got my Milkbone underwear on.