So it seems like the further you progress in galactic challenges the more of everything you get. Which essentially rewards players with larger galactic power who have the teams/mods/gl's/etc to finish all the tiers and punishes newer players by giving them less of everything. As opposed to just giving more of everything why don't you alter the rewards given based on how far they player is able or chooses to progress. If they don't get very far you could decrease the amount of end game focused materials like omicrons and mats needed to slice mods and increase the amount of credits/gear/ship building materials/character shards. You could do vice versa for players who do well who likely don't need the things that newer players need. Perhaps you could let us see ahead of time what each box would reward and players could choose based on what they need most which one they'd like to pursue. Just an idea.