The players do not want infection 2.0 many other players would like to keep their rank and they outweigh the ones who want infection 2.0 that is why there will most likely never be a infection 2.0.
The p4/p5 sword switch has been added, but p5 has not had the sharp 1 removed from it. (Not sure if intentional)
this type of thing has been suggested before, I love the idea as I always have because it gives infection players the chance to show off their skill in their stats and makes the games atmosphere more competitive and really entertaining.