[member="Sarge Potteiger"], [member="Slate Estrada"], [member="Arumi Zy"], [member="Strider Garon"], [member="Mrrew"]
I've honestly never had any personal problems with beskar. Sure, I write a good amount of Force users, but going up against saber resistant armor is always just the same. The armor negates the effects of one weapon FUs have, while they could still use the Force to increase the pressure of the air around you and crush you. Or use lightning on you. Or fire. Or just hit you with a really, really big hammer and break every bone in your abdomen. Seriously, I don't think that the Mandalorians should be restricted their armor.
However, I agree that there has been abuse before and there will be once again if there aren't rules. Aside from doing a development thread, you could always restrict the armor to a timed setting. Say you're a new member joining the faction, maybe make it so they have to be active members of the faction for around 30 days or so before they can get their armor? Note this is a suggestion I came up with on the spot, so don't tear apart my ideas too badly.
But I do agree that Mandalorians don't have to dev thread their armor. Especially when Yuuzhan Vong have just as strong Crab armor and don't have to do a development thread for it.