Let's get the most important issue out of the way right up front. WILHELMSCREAM? Apparently, it's a stock sound effect used in hundreds of films and TV shows, especially for when a character is injured or falls a long distance. So I like to think it's on purpose that it's right below VICTORIAFALLS...
There are a ton of fun entries in the puzzle today, starting with 4D: Crime-fighting vehicle (BATMOBILE). I love how straight-faced the clue is. Even better is 11D: Carol king (WENCESLAS). Hah! VIRTUOSOS is excellent as well.
I have been in many "academic settings" and have yet to see a non-metaphoric IVORYTOWER. Was there ever actually one? Apparently not, only non-literal ones. I'm learning so much today!
I found myself in a bit of trouble when filling in 17A: "Glad I didn't have to deal with that!" I first used the pronoun "him," which seemed the most classic form of the phrase. Then I suddenly found myself thinking, why a male pronoun? Perhaps Mr. Mahnken would choose to buck the trend and insert a female one instead. In addition, ABmSE seemed incorrect. But of course ABrSE seemed just as unlikely. The correct answer suggested itself, and all genders were equally represented in BETTERYOUTHANME.
Outside of the wonderful long answers, there is more than a small amount of compromise in the fill. I don't hate the corner wtih TIANA, ELCID, and SETTE, despite the proper names and foreign languages called upon. And it's improved by the excellent clue for 55A: Rod and reel (UNIT).
On the other hand, BARB? This is an odd choice for 1A. I suppose the little twist of wire must in fact be called a barb, but nobody calls it that. And RETIP is just a no go for me. There are a few other examples, but I enjoyed the long answers enough to make up for them.