Wow. I didn't know you could complain before the official check-in time. Well, I know you could complain anytime but I wouldn't think it's valid. Or am I wrong on that?
I know Disney asks expected arrival time and it's a nice surprise when it's ready prior, but I feel like guests can't expect rooms to be ready any earlier than official check-in time. If they're being cleaned, they do need time to turn the rooms over and I imagine that process is a little more thorough post-COVID.
If I wanted to guarantee I would have a room early in the morning, I would imagine I may need to pay for that night before and anything else would be strictly pixie dust.