Or is the split row described above better to avoid the 'stranger-climbover' ?
On a busy route, because of the bassinet position, you're unlikely to get the whole row of four at the back, because you can't pre-assign the bassinet seat - you either have to take the other three (plus one other) and hope that there's nobody with an infant on the booking, or sit elsewhere. With that in mind, I'd go for the 2+2. I'm a window seat addict, though