It wasn't such an odd reason. Arthur Laurents has issues with Patti for bailing out on his play, Jolson Sings Again. I don't think he has issues with her talent. If those two could kiss and make up, maybe it could come to pass. See what you can do, Dolly. You've always been a woman who arranges things!
As for Patti playing Rose...well, I do think she'd be a very good Rose. She's comic, can belt the songs out of the park and also has the dramatic chops. What makes me less interested in Patti actually playing the role is I think I can almost imagine that whole performance in my head before I actually see it. I'd think she'd be very much in the Merman mold. Not that that's a bad thing. But what has been interesting about Bernadette's Rose is to see the different colors the role has. While I'd gladly see Patti's Rose, I'd also be interested in a quirkier choice for the role as well. I wonder what Bebe Neuwirth, for example, might do with it...
"Gif me the cobra jool!"