Personally, I think that the standard Mando set up is a little played out. By that, I mean standard chest, leg, gauntlets, kneepads, etc. Introducing a unique design into it, be it the chest, back, gauntlets, legs, helm, whatever, is cool. Didn't Mandalorians really just modify their gear for whatever their mission was?
Well think up a backstory, and modify it. And not just the colour scheme!
Like, if your speciality is sniping, you might want lighter armour because you'll have to be in a concealed spot for a while. If yours is heavy weapons and demo, then you'd probably want heavier, more reinforced, kind of industrial armour. It's all relative, but I do agree that the same repaints of Jango and Boba do get kind of boring.