This matches my price research exactly, and my conclusions. Stay away from Glacier because the gotchas are not worth it. The moment you need any of your data your cost will skyrocket. Plus dealing with AWS unpredictable pricing is totally not worth it.
Not sure when you last looked into Glacier, but they did away with the "peak hourly request" fee which could be insane if you restored data too quickly. Pricing is much more reasonable now.
You still have to wait hours to download your data, but Glacier deep archive is about $.001/GB per month for storage and about $0.29/GB to download (plus some transaction fees that aren't usually significant).
I b2 everything nowadays.