Ian the second row is identical to the 3rd row in that it’s two and one full seats so you either have to remove one single or one pair.
they are full comfortable seats plus if you remove either row then you can fold and slide the others full length if required.
you can factory order an option of receding seats with a table we would have loved this but didn’t benefit from a factory order and it has to be as floor rails are different
larger battery is available on van but not mpv yet in U.K. but has always been on offer with Opel where it’s marketed as New Zafira with 3 body lengths and two batteries
As yet range has not been an issue which is good as next time it won’t restrict choice and I think that the larger battery would offer a further 60 miles would be perfect although a caveat would be the bigger the battery the longer to charge therefore using the cheap electricity time so by that I would still aim to use my max 5 or 6 hours at night.
things I know now that did not consider