You are right Phil, I have had a few that even the 2nd row remove completely just the same, now they do fold down on themselves so take up a lot less room but while I personally don’t think they are too heavy that might not be the case for others, on the flip side it does leave a totally flat floor that is huge and it also gives the option of having just 1 seat in the back and still space for mobility gear.
I would say that if you need 7 seats on a regular basis but still need to stow the seats all the time then it might be a pain.
Regarding the DPF on Peugeot/Citroen BlueHDi engines I have never had a problem with them and found that they only needed the occasional run down a dual carriageway to get hot enough to clear out, tbh if you were driving in this christmas traffic for more than 10 minutes then it would be enough to allow the regen process and searching for problems with these motors I can hardly find any results on google and I don’t remember hearing of it while I was still in the car game.