I may be totally missing the point but, in Just Because, the chain and allemande are with *different* people. I agree that's a common bit of choreography with a well established history - particularly so in squares.
In the dance I referenced (and how I interpreted - perhaps erroneously - the original request), the person you chain to and the person you allemande with are the *same* people, and the moves proceed directly from one to the other for more than a minor fraction (see below).
I'm happy to let go any claim to uniqueness for this approach, should it matter. We all just add little bits to the foundations we've inherited.
Greenfield Tornado – Becket – Don Veino 20161218
Left Diagonal Slice & Take to Gent’s Side (Neighbor Swing)
[First time can be straight across Give & Take; Alternate A1 = Diagonal Circle Left 3/4, N Swing]
Ladies Chain (to P)
Partner Allemande Left 1+1/2x
Full Hey, Gents Pass Right to start
Partner Balance & Swing
End Effects: Wait out crossed over on Left Diagonal at ends.
(Note: as covered in my blog post on this dance, the same sequence but for the A2 was independently done previously by Linda Leslie as her dance Greenfield Storm. I modified my dance title as shown to honor hers, once I became aware of it.)