He doesn't have enough for that. I estimate he has between 20k to 100k shards left as of chapter 1399, so why not use a few thousand of them to max out his edicts? I'll tell you why, because the author can't figure out what skills completing those edicts give.

I would love to see an INSUPERABLE Edict of Conquest, and perhaps even one of Farming. It would be very fun to be introduced to a Supreme bloodline of farming race.

Please, Adui, for the love of God, make Noah use the many Shards of Cosmic Heart he has left to max out all of his edicts.

I bet that moron of Noah will use this valuable Resource Points instead of the abundant and less important shards to max his edits.