One common complaint is that folks want to see galactic challenges more often. But because of the way the game scales we have 7 different levels to compete at which means we would need to do the challenges 14 times a day in order to make progress (which is comparable to the slog that Galactic War was ages ago).
To solve this problem I suggest simply to automatically give rewards for any phase that was passed at a higher tier level.
So if I can do the missions at tier 6 I should automatically get the rewards/completion for tiers 1-5 without needing to sim. That would keep the event scaling to all player levels but would prevent the challenges from becoming a grind for all.