One example of repeating melodies is Cabinessence's doing doings and Wonderful. Or those three phrase-ending notes he'd been using since Pet Sounds in GV's "ha-a-ir", WC's "chi-i-imes", CITFOTM "ma-a-an" and CE "ra-a-ange".
These all worked like a charm, but didn't stop from being a limitation
my son calls this the Pet Sounds Tic, and it has made Pet Sounds unlistenable to me for years. It's in every song!
Maybe we should all accept that, by abandoning SMiLE, Brian made another genius move by creating the first do-it-yourself modular album. This wasn't attempted again until the 90s by Todd Rundgren, and then Nine Inch Nails. He basically said "Here's the stems. Make it yourself. There is no right or wrong way"