I'm asking for bigger steps in-between each shot, not more shots. Less shots for the same result actually. This would shorten the time between your first and last shot, and thus make hand-held HDR easier.
An example:
Suppose you have a scene which ranges from 2LV to 24LV. You'd need a DR of 22EV.
Each shot can take 14EV.
You would expose your 0 shot to capture 6-20LV
-2 captures 4-18LV
-4 captures 2-16LV
+2 captures 8-22LV
+4 captures 10-24LV
Since the -4 shot captures LV2-16 and the +4 captures LV10-24, you could get the same DR using just these two shot. (disclaimer: I haven't actually tried this
)If the full 14EV were to be captured perfectly noise-free you could use a difference of 14EV between each shot and a 2 shot AEB-HDR would give you a DR of 28EV. I'm not sure how much the ranges of each shot have to overlap in practice, but I don't see why the difference can't be a lot more than 2EV.