Implement the old unused Matrix shards from planetary Datacrons (RED, BLUE, YELLOW, GREEN)
Into newer lv30, lv60 (f2p) and lv80 (endgame) Relic combinations
These changes should revive Datacron hunters on all the planets again and resuscitate the old Relic Items of lv50 endgame items
(I've suggested Crafting bags to join the PVP and Flashpoint reward pools years back and some other quality of life changes into Heroics becoming endgame currency source it did revive all the old dead planets, so I know what can work)