Originally Posted by
pititom
So now, when I read : "Weight concept – 10Kg extra for Elite members and 20Kg for Elite Plus members" and "Alliance-wide harmonization", I conclude the following : all members will now allow 10/20 kg and that's it.
In other words, Delta will not (now take the restrictive meaning) waive the fee for checked baggage for E/E+ members. IF you are entitled a bag, you'll get 10/20 kg extra. If you are not entitled a bag, you will get nothing, no matter what's your status.
Maybe I am paranoid : Skyteam being the best and most generous FFP program ever, why should I be worried

?
Piece concept applies on all DL flights, so your argument about the weight concept is not valid.