FYI it doesn't matter if the Air comes with a smaller charging brick because that's the speed it charges; it doesn't charge faster with the MBP's larger brick.
I am very much hoping for a revival of the 12" MacBook, hopefully with two ports. The one-pound difference doesn't sound like much, but it's real. A 12" MacBook with a bit more oomph than an M1 would be irresistible.