it's great to see this type of thinking in TKD
i trained in the Chang Hon forms up to 4th dan and have always looked at alternative applications for movements. mainly because some of the movements seemed to be not make much sense. things like W-shaped block and U-shaped block!
the low-block one posted above is fine
and as mentioned can be used to create a follow up alternative to any move that comes next in a context of the pattern your are looking at.
i have joined Prof.Rick Clarks Ao Denkou Kai who is an 7th dan in Chung Do Kwan TKD and 8th dan in Ryu Kyu Kempo (among others).
look at other styles of MA's and you will see things that remind you of movements in your own style, and you will find that you will get some nice applications while still staying true to your style!!