currently the more blue print in the game, the more it will cost to discover them all, and exponentially so. As the order of discovery is random, that means some of the current ones that people love might be pushed to the back of the list, hence resulting in that specific one costing more as a result of an addition of blue print of questionable quality. Overall, it increase the expected cost of a blue print as more blue print is added into the game
This is the primary reason people give for many people shooting down blue prints, for example here:
viewtopic.php?f=6&t=22676With the system I proposed, the expected cost of each individual blue print is affected in a minimal amount, if affected at all, by the addition of blue print, hence we will have a better chance fo seeing blue prints that is useful for some but not for all ppl added into CTL, as such addition will hurt no one while helping some.