Terraforming is a much better card than Butlerusk and you also need to take out cards that slow the deck down.
-1 Butlerusk
-1 Chouxvalier
-2 Mehpl
-1 Cyber Valley
-1 D.D Warrior Lady
-1 Genex Ally Birdman
-1 Giant Rat
-1 Grand Mole
-1 Grave Protector
-1 Double Summon
-1 Field Barrier
-1 Pot of Avarice
-1 Recycle
-1 Raregold Armor
-1 Madolche Waltz
-1 Waboku
-1 Ultimate Offering
The cards above just slow the deck down. I wouldn't really see any chance of you using Pot of Avarice unless you spam XYZ's and you have Malefic stardust in place of Field Barrier.
Put Avarice into the Side.
+1 Mageleine.
+1 Mewl Feuille
+1 Card Destruction
+2/3 Pot of Duality
+2/3 Terraforming
+3 Fiendish Chain
+1 Solemn Judgement
+2 Solemn Warning
You should also add in the staples into the main deck rather than siding them out.
(Monster Reborn, Heavy Storm, Dark Hole, Book of Moon etc...)
And I would take out unnecessary synchros and replace them with more XYZ cards.
With the XYZ's, you could add in Madolche Tea Break as well.
Fill up your extra deck, make a proper side deck and you're ready to go.