You have to participate in the mission to rate it, you can't just give somebody 5 stars without doing something.
Plus I imagine that word of mouth will spread of anyone abusing it, to be avoided.
If you want to just compare things back to other games, then Elite;Dangerous, No Mans Sky, Empyrion, Everspace and many more are just rip-offs from Eve.
Of course some games will have similar features to others. If the feature works for the game, then why not have it also? Seems like common sense to me.
As for half-done: Why would we want the exact same system that CCP uses for Eve, in DU? Do we have NPC space stations and such for the pre-set destinations? Also, player constructs usually consist of many cores, so would you list ALL the players cores in the game as pre-set destinations to choose from? Seems rather silly to me... I'm glad they are implementing a basic version and then tailoring it to DU's style that straight up copying another games setup.
Now, my question is if they will consider being able to create 'Loans' to players, so that you can help someone invest in something and they agree to pay it back (and maybe with interest) over time? Giving, say a construct they have or items as collateral...