It sounds like you did everything well to me. I do pay more attention to how the air cells are looking than trying to aim for a specific humidity. I also have the nurture right 360 and dry hatching usually works well for me. If humidity gets a bit low (under 25%) and the air cells are on the larger side already I'll add some water in the A port.
I've never waited a full 48 hours (too impatient) but I have gone up to 36 hours of resting upright before setting and do find that on average the eggs that I let rest for at least 24 hours do a bit better than eggs that are not rested or only rested for a little while. The one exception I'll make is if the weather has been very hot I may avoid resting for more than an hour or two in fear of cooling an embryo that may have been developing already during transport. I try to avoid ordering eggs during hot weather though, some of my worst hatches from shipped eggs were during hot weather.
I have turned eggs from day 1, waited 2-3 days, and waited up to 5 days with shipped eggs. I find I am most successful with 2-3 days of not turning. 5 days was my least favorite because although I did get a lot more to develop their blood vessels didn't spread around the egg properly and around 2/3rds died on day 19 before even trying to internally pip. I try to have the eggs incubating upright until I start turning (I have another incubator for this that holds the eggs upright).
In a lot of ways shipped eggs are just tough and its really hard to say what the best approach is. I've heard plenty of people using the nurture right having success just putting the eggs in soon after they arrive and laying them on their sides and turning right away.
I find malpositions are rather common with shipped eggs and for this reason I avoid hatching upright. I've had too many pip on the wrong ends or in odd positions to feel comfortable hatching upright personally. I do know a lot of people have good luck with it though.
Honestly I've noticed with shipped eggs sometimes odd things just happen to the white/albumen. I've had a lot more sticky albumen in shipped eggs than in local eggs. Although I haven't experienced watery albumen like you did the fact that they were shipped makes me wonder if you just had bad luck due to the shipping.
Going dry next hatch sounds like a good idea and watching the air cells carefully and adjusting humidity based on that. I hope you have better luck next time, it's always so hard losing them during hatching.