I have been building up awakening soul fragments the past week and have run over 400 LOL XV dungeons. Zero level 5 colored awakening shards have dropped. I get clear 5*, but I haven't seen a color specific one in a long time. It feels like they were either removed, or the drop rate reduced so low as to make it impossible to get those. Next time I run it I will try to remember to look and see if they are even listed in the loot table for the dungeon any more. If they are the drop rate has to be incredibly low.