Two things that first attracted me to the "LN Symmetry" (eltoo) style of Lightning channels:

1) Symmetric channel updates are less complex to think about; once you start layering on all the other complexities and edge conditions a simple base makes a big difference.

2) Potentially much lower bandwidth and communication round trips to update a channel. This isn't important over high speed internet, but if you ever want to use low-bandwidth radio it does.