I think Bazaar is too important to cut. It can't be run like BUG. The individual cards in BWG are stronger, but the BUG cards synergize better together. Sculler is better than Mage, and Cannonist is better than Cursecatcher and Stifle. Swords isn't a better card than FoW, but we're packing enough Thoughtseize effects that Swords is better in this deck. However, Null Rod, Stifle, and Cursecatcher are stronger together. You need Bazaar, because unlike BUG where you can get a soft-lock, here you just have to keep taking steady shots at them. Thus you don't want to hit them hard and then go blank for a few turns.
I'm not sure on Squee though. My first impulse is that Skullclamp would be better than Squee. It's starting to be a staple for me in aggro decks.
Vroman also mentioned that Stax is a weak point. Hunting through some cards and saw Serenity and Seeds of Innocence. Serenity destroys all artifacts and enchantments on your next upkeep for

. Seeds destroys all artifacts at sorcery speed for

. They would gain a lot of life though (equal to casting cost). Both definitely seem better answers against Stax than Kataki.