But a lot of the help type of stuff they've been doing is stuff like having a TE chip so that the defender can't just speed rush up the field. That only slightly disrupts the route of the TE, who's usually not the first or second progression anyway. Or keep a RB in to block for a bit, then have him leak out if the play looks like its breaking down. That's really not disrupting the play much.
I agree with this. Chipping directs the defender to one side so the offensive lineman doesn't have to try to stop the defender from going around him on the outside. The defense still has to account for the tight end after the chip or it's an easy 5 yards and possibly a lot more. Keeping a tight end or two also helps in the running game as we have seen.