Diveback path

I am currently reviewing, cutting up, and evaluating our offense from last season. We only saw two teams who played an odd front against us. Both teams had a head up nose and did not reduce the front to either side (we are a 3 wide team)-at least initially, giving us a 4i, 4, or 5 technique DT and a ghost 9 tech DE. I am wondering if we should alter the dive path when they leave the guard uncovered, to have it hit a little tighter. We currently coach the fullback to aim at the guard's outside leg, but vs. one of the 50 teams, they played a 4, sometimes 4i on our tackle. I thought if the diveback was hitting just a few feet closer, it would remove the QB from the dive read and give him a better chance to read the DT. Should we read the 4i DT, or just recognize it, auto pull, and pitch off the defensive end? Dive read is the 1st defender on, or outside the tackle.

Conversely, once they reduce the front to a 3 and a 5, now having the diveback aim at the tackle's inside leg seems to make sense. Now the DE is our give/pull read, we're doubling the 3 tech and chipping off to the MLB. With the veer, isn't the idea to hug the double team (inside seal) reading the next defender out? This would require you to tighten/widen the path of the FB since you're double teaming the NT versus the 50, and the 3 tech versus the reduced front. Thanks for any thoughts on these topics.