Well, I find it strange that miners get this loot. If anything, it should be hunters that are able to loot beacons because the dungeon missions are not designed for miners. Of course, it was probably MA's intentions to give something to the miners who could sell the device to hunters.
If I was designing loot distributions, I would put the dungeon beacons in low-level mobs so noobs could have a chance to benefit and possibly go with higher level hunters on the mission. Miners would be able to mine/find items in the ground. For example, a few pecs, some trash items (basic filters and other crafted stuff no-one uses), better mining tools, and sometimes really nice rare artifacts/furniture.
MA could create a separate sub class of mining and tools to go with it - Buried Treasure Hunter.