Well, if you mean it doesn't have a unifying theme, as in every card has flying or card drawing, you're right. I prefer playing more well rounded decks, but to each their own.
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I just didn't select any of the 5 colors, then selected Artifact as the deck type.
I've got a pretty similar deck of my own. One trade off I'd consider is a gutsy one - take out the Millstones for Mesmeric Orbs. Yes you mill yourself, but it keeps them from wanting to do anything mana intensive and punishes them for casting spells, activating abilities, etc. Meanwhile you mill 3 cards for a Mind Funeral and 2 for Glimpse...big deal.
Took me a minute to figure out why Manamorphose was in there...wow! Very sneaky, never occured to me, I love it!