I know I've said this before, but I know it's an unpopular opinion: I actually liked the Mail-It Shop.
Yeah, I know it was disheartening to people who grew up with the Fix-It Shop (hey, so did I), but I really felt like the addition of a Mail-It Shop - as well as the neon signage on the facade) - helped give Sesame Street a touch of modern inner city realism that it was kind of lacking in the 90s and into the early 2000s. This is one of the main reasons I love the new retro Hooper's Store so much: not only does the retro redesign look amazing with bringing back the checkerboard tile and everything, but the neon sign is a great touch - even Alan told me he loves it.