Loved it. Great start (and finish) with the bookended PUDDYTAT (1A: Carton canary's bane) and MELBLANC (58A: Voice of 1-Across). You know, Dad took me to see Mel Blanc speak at Clark University long ago. He was great. But you knew he would be.
I'm gonna say there was no slop today. Even the threes were enjoyable, from the rare variant ETD (18A: Gate announcement, briefly) to the well-clued URL (54D: It might end in "mil"), and I even remembered ASU (49A: Sun Devil Stadium's sch.)! There was a PILE (1D: Ton) of clever clueing, starting right off with the first down pair of "Ton" and 2D: Ton, e.g. (UNIT). And 8D: It has eight neighbors: Abbr. (TENN) sets one up for the tricky 49D: Mont. neighbor (ALTA). Well, ok, there's the one piece of junk. The clue is tricky (because, come on, who ever thinks of Canada?!), and I suppose that's short for "Alberta," but I've never seen that abbreviation before.
NODUH (32A: "That is so obvious!") was a good one. Frannie exclaimed "They're going there?" when she filled that one in, but we both like that they did. Some side-by-side cryptic-type cluing with 15D: Delta lead-in (CHARLIE) and 9D: Stars and stripes, say (PLURALS), and we liked how the "Stars and stripes" clue paired nicely with 12D: Hammer and sickle holder, maybe (SHED) (Fantastic!). Also, what about 38D: One shot in a cliffhanger? (JREWING). It's all so good. So tight.
It went along smoothly and happily until we ground to a halt in the SW corner. We KNEW that "Pope" was too easy an answer for 46D: John Paul II, e.g., but we couldn't help ourselves, and that really threw a wrench into 55A: Ray Charles's Georgia birthplace (ALBANY), which I kept thinking I should recognize, but which I couldn't see when it was "AP__NY." Finally, we agreed that REORG sounded good for 57A: Inc. magazine topic, and things came together. ALAR (47D: Creator of bad apples?) though? Is that because it tastes bad? I actually tried "Alum" here, influenced, I think, by the Warner Brothers cartoon references. Oh, wait, I just looked it up... it was banned for fears that it caused cancer. Got it.
Strangest trivia fill - DIAN (19A: Longtime model Parkinson of "The Price is Right"). Who knows that?
OK, we could probably go on and on, and I'm sure I missed great clue/answer pairs, but suffice it to say, we thoroughly enjoyed this one. Great vacation-day puzzle!