So the problem with this card, I think (and I mean the philosophical problem, not one of the many game play problems), is that it's clearly meant to be a pet card for Null. And while I'm certainly in favor of him having his own suite, he already had two thirds of one the second he was released. All they needed to do was release Nfr, which they did, and he had his own suite. It was mostly unoriginal, but it worked. Except for Nfr. Just use Corroder or Paperclip instead.
Aaaaaaaanyway, that's why this card doesn't work. Because it could never have worked. It was trying to fill a niche that was already filled from the get go, and filled pretty perfectly I might add. That left two outcomes--Either the card would be terribly weak, or terribly strong. I'm glad they went with the former personally, but it's still a shame.
Really, the only way this card could see play is if we start seeing tons of high strength, cheap sentries, or if something happens to Mimic. Only then could this card have a chance.