Here now--and booked an extra day since there's a snowstorm in upstate NY so I figured it'd be easier to change my airplane reservation and get another night at FQ now rather than chance things tomorrow.
Yay! One extra day at WDW. That can never be bad.
Meanwhile, back at the G+ ranch, yes, you can absolutely modify a G+ reservation now. I've done it. Well, to be specific, you can do it on the Android app. I have no idea if it works on the Apple app.
There are three dots in the upper-right corner of the G+ reservation and when you touch them, Modify is one of the choices. Now here's the trick--you can only modify it to the time it gives you, so it's not like you then have a range of 5 or 6 times to choose from. You have only one choice. But that one choice helped me a couple of days ago, so I took it.
I'd like to point out something else that confused the heck out of me yesterday. My sister and I were at DHS and we were in line for MMRR twice and both times it broke down before we got on the ride, so we got anytime G+s as compensation. Everyone did, even people who didn't have G+.
When I looked on
MDE, it showed not 2 but 4 anytime G+s (I hate showing LLs because that's easy to confuse with the ILL$). So I thought they'd mistakenly given each of us 4 G+s instead of 2 each.
However, no. 2 of the G+s that showed up on each of our MDEs were for the other person (2 were mine and 2 were my sister's--both on my MDE--and the same on hers). Very very confusing.
Thought I should point this out.