How are Spartan looks

How come in Halo Reach Halo 3 and 4 but yet and Halo 5 we can’t fully customize your Spartan doesn’t make any sense because I like to fully customize my Spartan and I don’t know about you because I like to be different than other everybody else as we have so many or more sets and so many helmets but yet we can’t change armor how we want it because I see so many people wear the same armor sets and helmet and me and other fellow halo players would like to fully customized are Spartan to show what kind Spartan we are

You can thank the req system for the lack of customization.