What I think will make it work, is using cards that care about power and toughness. The card that got me thinking this way was Twisted Image. After Glenn is unblocked you can play it to deal 3 damage and draw 4 new cards for a single blue. That seemed a pretty good deal. Looking on scryfall for other cards that mentioned toughness is what brought me around to including Rasaad yn Bashir & High Alert. These two cards turn minor damage buffs like Wings of the Cosmos & Refuse to Yield into major beats. That makes lethal commander damage a plausible way to win. Unfortunately Glenn will only draw cards based on his power, so even buff spells like Flare of Faith are still best.
I also threw in other common staples from toughness matters commanders such as Slaughter the Strong, Retribution of the Meek & Fell the Mighty for some one sided board control.
The all star win condition here is E. Honda, Sumo Champion. Based on some gold fishing, it is not uncommon to have more than 7 cards in hands when he attacks thanks to Glenn's draw triggers. A small team of creatures can be lethal with that kind of buff. I assume this to be turn 7 or 8 at earliest since I want to keep something in hand to protect E. Honda after I cast him.
Which brings up something else I like about this deck. In azorius the buff spells don't provide as much damage as Gruul would, but a large number of the spells offer some form of protection built in such as indestructible or hexproof. Others can untap a creature giving me an unexpected blocker. I'm bad when it comes to overcommitting, so this deck will force me to think differently.
The deck overall is still probably a bad idea, but I look forward to playing it soon.
Decklist
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