The snap tees are definitely a personal preference. I didn't use any onesies until the umbilical cord fell off and found snap tees easiest to change. Curious what you used instead? Expecting no. 2 in less than 2 months and plan on using snap tees again, but interested in other options too!
I don't want to add the bassinet to the list, because every baby is different. I did mention that we tried the bassinet for 2 weeks but he would not sleep for more than 15 mins in it. He hated anything flat. It's something parents need to figure out - crib, bassinet, rock'n'play sleeper... My niece went straight to the crib. My nephew only slept in the carseat for solid 3 months!