I fully agree to work in split when DX is on the sat, because some stupid ham's still love to use too much power to get over the pile-up. In split, also weak stations have a bigger chance to work the dx, and as DL5RDI mentioned, you allways hear the DX station talking.
What is, in my opinion, the benefit of working full duplex? There is no need to here yourself. Just working simplex here and never had any problems, no need to hear my own voice. Worked also in split with the FT817, 2m as IF TX band, 70cm as RX. Just check only once the freq offset between up and dwnlink, allways right afterwards.
It's irritating that people still need to tune on the right freq, giving an echo on their modulation when they go on air because in the background some sdr-stuff's volume is too high.
73's,Jerry