Matthew Tommasini :
How about allowing us to have a Full Back to block for our Running backs , where the fullback can also catch passes for us and also they can get some carries for us.
You already can do that.
I use a TE at the FB spot in wishbone and send him where I need a blocker. He'll block automatically, just adjust his "route" on run plays in the strategy building. If you'd prefer a RB to do it, train the RB in Blocking and Receiving (and reception range, carry, some speed, etc.).
In theory, I could also do that in Pro Set, but my players aren't precise enough or fast enough for opposite edge run plays yet.