15 R4, general Alienware questions

Hello,

I have had my Alienware 15 R4 for 2 years now and I adore the thing, super sturdy, the keyboard is responsive and has a satisfying click to it, It runs whatever games I want at great frames and an awesome refresh rate. I am not super into computers but I generally know my way around, I was wondering if someone could give me some tips on optimizing my computer performance and general experience, there are loads of setting in the command center, FX, thermals etc, and I am not sure what exactly all of them mean or do. For those of you that also have Alienware what are some helpful settings and optimization techniques you can do inside the settings of the laptop and the Alienware command center? So far I make sure to update my Windows 10, my NVIDIA Geforce Drivers and I've been checking for Alienware updates as well, but I am sure there might be more behind the scenes that I can be doing.

Another question is that I am not a huge fan of the TN panel I bought it has an amazing refresh rate but the colors tend to be kinda bleaker than I would prefer, is it possible to swap out the display panel? Is this a hard task to undertake? I am pretty sure I would void the warranty right? Could I take it to a Dell shop and have them replace the screen, so that it doesn't void warranty?  I love the rest of the computer and I can easily see myself using this thing for another 3-5 years or until it breaks. And if I am gonna keep it that long upgrading the screen might be a worthy investment 

Any response would be appreciated thanks all,