Install an ad blocker Wipr or AdGuard works well.Swap out VLC for Movist as again it`s a reduced load on CPU/GPU.Swap out Chrome for Chrome Canary as it`s generally more optimised for OS X and will extend battery run time, reduce thermals.Limit the dGPU`s usage with gfxCardStatus.
So Being an owner & user of the 15' MacBook Pro forever Over the years the 15' has frequently struggled with it`s thermals, especially when an external display is connected as the dGPU switches on by default, internal temperatures soar, equally there are some steps that can be taken to reduce the systems temperature It is the trade off for being thin and light, yes the fan noise can be distracting some solutions: I don't think you have any problem, this is how Mac`s are.
