By the time an MP model reaches the wedges, the loft dictates that there is very little between the heads.
An MP52 player doesn't need anymore forgiveness than an MP67 player.
So no point to make 4 identical wedges with a different logo stamp.
On the 2 iron issue, we take our lead from the tour. Now these guys don't see a need to play a traditional 2 iron, seems a little pointless for the rest of us to try.