Since Mage Wars is a game of instant answers, I think "relying" on the "net-deck" for your spellbook is actually a downside. Good players will recognize what's being played and are able to anticipate the remained of your spellbook, and since you can grab what you need when you need it, you can be prepared for any tricks.
End of the day, I think that the nature of Mage Wars makes it less of an issue, as it's more in the skill of the pilot than the strength of the jets.