PCs are supposed to solve problems and be creative, right? This isn't a problem to lament, it is something to celebrate. As PCs become more powerful they'll have more options to bypass problems. Let them. Congratulate them. Celebrate the success. As a DM, you're there to help weave a good story and give them a mix of interesting challenges and chances to show that they're playing heroes. If everything is designed to be a deadly trap, deadly encounter impossible puzzle they stop feeling like heroes. Let your Spider-men face off against some of those run of the mill muggers!