Let’s also not forget people who just don’t care about getting all of the game's achievements, or don’t have the time to do it. They just want to be able sit down after a long, hard day at work or school, and enjoy JWE. For these players, Jurassic Difficulty essentially takes the fun away from the game by locking away fantastic looking skins in a mode that is beyond frustrating and incredibly punishing, making it not worth the time, the effort and heartache to participate. The skins are also tied to the game's mechanics, adding 25% in popularity for that species of dinosaur, making them more popular for the park’s visitors.
What I think should be done to satisfy this group of players, as well as the players with disabilities mentioned in previous posts, is to enable cheat codes that unlock a Jurassic Difficulty skin of a player’s choice. However, whilst this would unlock their chosen skin/skins, if those players want to get the achievement that they have participated in Jurassic Difficulty, then they have to play that particular level for Challenge Mode.