Here's a few thoughts; and I'd really like other's opinion on these things:
Mail to the door.  Do those of you in newer developments like having the lock boxes down the block? My sister does, but she's nuts about security. I worry about my 86 year old mother having to go get her mail 3 houses down in the icy months.  My suggestion would be: deliver two routes with one carrier by doing one route on m/w/f, and the other on tu/th, rotating every other week...but it would be to a mailbox on the house or a slot in your house. 
According to the article, the package prices maybe a little low.
" Forty percent of the e-commerce giant’s packages are delivered by the Postal Service, compared to 20 to 25 percent by United Parcel Service and 15 to 20 percent for FedEx"  It's good that they have a large share, but perhaps it would support slightly higher package pricing?