Does Nibbana lie within The All or not?
I didn't read the question but Thanissaro says as a footnote: 


  To abandon the eye, etc., here means to abandon passion and desire for these things.


Nibbana is the same. Nibbana is not experienced due to passion &amp; desire for Nibbana. Therefore, passion &amp; desire for Nibbana is also abandoned. 

Nibbana is included within The All, i.e., included as a sense object (per Ud 8.1) experienced by the mind sense organ. Thanissaro is wrong translating 'dhamme' as 'ideas'. 'Dhamme' is 'mind objects'. Nibbana, per Ud 8.1, is a mind object or 'ayatana'.