If this will be prohibited than new Guilds will never get chance to fight the big guilds as they can fight Big Guilds only by teamwork, i mean if i have started a guild of 30 players and we all r in LMA than we construct traz with this trade and we have 30 traz, with the help of 30 players we can do something in GvG, without traz it is difficult for a guild t fstly level up and advantage is the big thing, if you have ARC in LMA that means you have adv as compared to a TE Player who doesn't have ARC otherwise the low level player can only be at low level.
Example - there is a Guild named AUSSIE AUSSIE AUSSIE in Jaims, their players went after Traz and now they are ranked 4th in Iron Age GvG Mp with a lot of hexes in their hand , most of them are low levelled and also you can check my Guild The Red Court,most of the Low levelled players have Traz, Through this we get help in GE, GvG so i think this must not be prohibited.