Any thoughts on what they will go with?
Would imagine it has to be aisle access for all seats. The other big factor will likely be retaining density.

If it was to be some sort of herringbone config, you would have thought that the XLR's would have went with the same seat as IB. Because they didn't suggests that it will be something different.
This makes me think they will have different seats than IB

It seems the only off-the-shelf seat with all aisle access that would allow them keep the density is the seat used by TAP - the Recaro CL6710