I feel like the SCAG needed to be 100 pages longer to be worth the money. One thing that was conspicuously absent was faction information. The AL makes a big deal about factions, and the SCAG would have been the perfect place for in-depth write-ups. I'm thinking 20 pages for each faction, detailing its history, prominent NPCs, bases of operation, etc. Instead, we got nothing.
I don't really see the factions needing 20 pages each. Maybe 2, I think, unless they planned on giving a full history down to the year, plus history for each prominent NPC. But yes, a bit more information on the factions would have been helpful.