the day flight is somehow managable in Eco
nevertheless, if we decide to buy AB tickets, I'll surely book XL seats (for money or for 10K miles per person), as regular ones are awful.
you can try to request an upgrade about 8 weeks before the flight - thatīs the time they sometimes release more seats - at least to their Tier members. Otherwise, you can go for an ad hoc upgrade, however be aware that a higher amount of miles is required for an ad hoc upgrade at the airport (likely only possible in DUS, eventually in TXL)
thanks a lot for this helpful information :-)