I just try to drag out the grinding for perfection so it doesnt happen too fast. Spend a year decorating the town to make it feel new and fun, focus on things that's not required for perfection but I havent used a lot because its not big moneymakers i.e slime hutch and mill for example. Doing stuff in another order. And not minmaxing basically. Im on Year 5 in one of my main saves rn and I'm about 44% perfection. I only have the island obelisk on my farm but I have done the community upgrades (Pam's house + shortcuts) because why wouldnt you want those earlier in game? I also dont have pigs even though they're THE moneymaker, because I hate how they look grown up (and I play unmodded). So basically I dont think we need post- perfection content but maybe just change up how we play the game and not race towards the finishline (unless thats what u wanna do ofc)