I don't like it for one simple fact...
There are people out there that only want to play and do runs with their friends and LS/FC people, maybe someone has a static group for the main storyline. Seeing that you cannot up-vote people that you queue with or friends that you enter with, they are punishing players for being loyal to a group and friends. How is it fair to people that have very nice, friendly LS/FC's who like to do runs with their group and help their group get though DF runs?
Isn't the point of LS's and FC's in this game to make a community that you want to play with? To be helpful to that group and to support them? But, you cannot 'vote' them up for being kind people who go out of their way to drop what they are doing to go on a run with those that need help in your group? Therefore people who never or rarely do random DF runs because they have a helpful and supportive group have next to no chance of receiving these 'points' and being able to get these 'items'.
What about 'having a group that is all one server' or 'a group that is all the same LS/FC or same GC'? Suddenly being helpful to your LS/FC/server is NOT a kind, helpful thing deserving some type of MVP?