Very good MF topic!
These are my thoughts....
With an O-line wedge style blocking scheme, I believe the con to the I-formation tailback dive is the potential slowness to the hole and protection against fast outside loopers. I believe the pro of the I-formation fullback is the ability to pick up the linebacker to spring the tailback for longer runs. If the loopers are picked up, a slower developing I-formation handoff to the tailback also seems to allow things to open up in front of him. For short yardage the fullback in the I-formation still has the stacked power, but unless the wedge blocking is superb, the ability of the linebacker to tackle the FB is there (but this may be okay, especially in short yardage).
Now with a more zone-like blocking style from the O-line (less wedge and drive blocking replaced by more rotational or lateral blocking motions ) I believe the fullback would have a nice ability to do some good solid lead blocking on D-lineman that might be unaccounted for by the O-line or to create gaps by trap blocking on D-lineman that were open to rush up the field.
I believe picking a blocking scheme greatly depends on the width of the board you are playing on. I really like the bigger board (bigger than 620) to open things up. We don't get too many functional playing topics like this, I personally like these topics.
Joe
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