Duplicate protection feels like a win-win for both Wizards and the players
Declaration basically just feels like the card you play when you don't quite have all the premium white removal you wanted
Further Upgrades The first cards I'd pick up to further juice up the deck would be untapped mana-fixing lands: Watery Grave, Shipwreck Marsh, Underground River, Morphic Pool, Darkslick Shores, Polluted Delta, Sunken Ruins, Undercity Sewers, Urborg, Tomb of Yawgmoth and then maybe a couple more Island / Swamp fetches
Subjugate the Hobbits Subjugate the Hobbits might be a touch too expensive, but Ive played Mob Rule enough to know that you sometimes want the little creatures
We took them for a test run to try out the strategies and had a bunch of fun finding the combos and win conditions