Congrats, You mom will love PBH! I see no drops for my January trip or my Feb one. What are your dates?
Not to be a Debbie downer, but what makes you think you will get an upgrade? when I was blue (& gold) over many years, never-ever received an upgrade, even the pay @ check-in type. Can't say I've read many instances of it here either...maybe if it's really dead
As platinum, when a suite wasn't available, a few times we were upgraded from garden to bay view. Honestly, every room we've had there (with exception of the ones close to noisy ice machine that finally was replaced) ALL the rooms are lovely there, enjoy!