I am sure there are many threads about how expensive the crafting system has become. Though I can see a reason why Cryptic does not want an 'easy' way for players to get high end gear quickly, the journey to that high end gear is pretty crazy now.
If I can give a small suggestion, this would be it.
For the lower the quality the gear, the greater the dilithium discount should be.
For an even mark green quality item, it should only cost 30% of the normal dilithium cost plus mats.
For a blue quality, it would rise to 45%, and then for purple, it should be 60% of the total cost plus mats.
The crafting system should not such an expensive en devour to level up. It should be a tedious sample grind!