Yet you forget that feats are halfed and the rewards from the galactic crates before the update would be given over a 3 day interval and even if you were only able to do 2 or 3 quests in tier 6 you would be able to get 1 omicron (plus the gear and character shards) with the new system you are limited to 2 quests for all tiers except for maybe tier 1 and 2 which give 3.
Even if you manage to have all requirements to the max tier (which is locked by both the marquee paywall and the pass paywall) you will be getting much less rewards over the period of the month due to the fact that if you only give the old GC crates 1 omicron it is still about 9-10 omicrons a month at minimum with the new system you only get like 3 omicrons without the pass and thats if you even manage to get to those levels due to the fact most sources of the pass points are behind a pay wall which means you basically have 3x less omicrons alone. This is being generous with the difference between the crate and the pass cause you could get 2 consistently.
Thats not even including all the extra resources crates used to give like character shards and gear which means you get so little resources now compared to before this change to galactic challenges. They should just revert the galactic challenge changes and if they want to keep the pass. (and remove the 2 pay walls on GC) as no matter what you are getting less rewards overall.