Regarding dynamic DL low-level availability and mixing with Skyteam partners, I'm seeing the following as an example:
If I search ATL-KRK, ATL-AMS on DL and AMS-KRK on KL, it's going to price ATL-AMS as not low-level. However, if I just search ATL-AMS, it'll show as low-level, O inventory. What I'm doing is booking ATL-AMS in O, then calling delta up to put in the O AMS-KRK segment, thus circumnavigating their dynamic availability.