I will go with "It Depends" LOL.
As far as some of the U.S. men:
I would have liked to see what Adam Rippon would have done with Rihanna, but I can see why they went to last year's crowd pleasing SP. Both programs worked well as Olympic season programs, so I think it was OK he kept both of them, especially since he missed the second part of last season.
I did wish Max Aaron kept his Bullfighter SP. I actually like what I saw at Nationals 2017. Though his programs this season were pretty decent actually and he skated them well. But I think the Bullfighter SP would have been a better contrast for the POTO FS then Les Miserables.
In hindsight, while I admire Jason Brown for taking on two new programs, in his case, he would have benefited from keeping The Piano free skate this season. Technically he had only had one full season with it since he only did it for half a season in 2015-2016 due to injury. I think while the free skate he did this season was beautiful, it was clear after a while that he never got his arms around that program and mastering that program AND trying to put in just one quad in was probably a big ask.
I feel the same way slightly with Nathan Chen too. I really liked the Mao's Last Dancer program at U.S. Classic, but after awhile it's artistic impact dulled a bit as he tried to add more quads. Honestly, his free skate at the Olympics was memorable because of the six quad attempts, not so much the program itself. I think Nemesis did it's job to show Nathan's artistic range and development and he probably could have kept Polynesian Dances for one more season -- at least when he was doing all those layout changes he was doing it with a program he knew somewhat. Honestly, I wouldn't mind if he kept this year's FS for another season so he can work on the choreography/performance of that program.
On the other hand, Vincent Zhou definitely needed two new programs. I don't think he would have had much benefit keeping either of his programs. I think the SP was well-choreographed and within his wheel-house and Moulin Rouge was a nice dramatic contrast to the low-key Snow Patrol. He skated both programs well at the Olympics. But neither is an artistic masterpiece and I don't see a lot of growth opportunity with either program, so I hope we'll see another two new programs from him in 2018-2019.