Luis:

here is an explanation of the meaning of via and to-stop:

via and through have the same meaning.

The meaning of 

"from A via {B,C} to D" is the strategy graph:

{A -> B
 B -> D
 A -> C
 C -> D}

The meaning of 

"from A bypassing{...} via {B,C} to D" is the strategy graph:

{A -> B  bypassing{...}
 B -> D
 A -> C  bypassing{...}
 C -> D}

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The meaning of

"from A via {-> B,c,C} to D" is the strategy graph:

{A -> B
 B -> C only-through {->  B,c,C}
 C-> D}


only-through is the negation of bypassing.
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The meaning of

"from A via {-> B,c,C, -> Q,r,R} to D" is the strategy graph:

{A -> B
 B -> C only-through {->  B,c,C}
 C-> D
 A -> Q
 Q -> R only-through {-> Q,r,R}
 R -> D}

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The meaning of 

"from A to-stop B" is the strategy graph:

{A -> B bypassing { /* all edges outgoing from B */ } }