Hearthhull, the Worldseed and Scapeshift is a big one, because that probably ends the game with eight or more lands to sacrifice
Aside from this, there are some dedicated cards to punish Tron decks, the most powerful ones being Blood Moon and Harbinger of the Seas, which can shut down the deck almost entirely
Festival also allows the player to attack directly as long as a Ghostrick Field Spell is face-up, meaning players no longer have to flip all of their opponent's monsters facedown before attempting to do damage (which made Link monsters especially pesky)
If a creature dealt damage by one of your Spiders dies (which, with deathtouch, it will), you get a token copy of that creature
Ultimately the change was probably for the best as there did happen to be a shooting at the opening of the Dark Knight Rises that made national headlines only a couple of weeks before Dragons Exalted was released
My next recommendation is definitely going to ruffle a few feathers: Rick, Steadfast Leader