Controversial opinion: The best VFX scene in The Expanse isn't a battle. It’s the freighter Amos is on, landing on Luna in season 5, episode 1 (IMHO).
Everything about it is perfect... The eerie silence, the starkness of the crater & overall scene, the gentle slow building music, the sweeping long camera shot, and the way the ship feels both massive and insignificant against the sprawl of Lovell City. I loved the little thruster bursts every now and then.
Even where Lovell City is... Nestled in a crater.
While I know most would usually point to the combat sequences, I think this quiet moment of arrival is the show at its VFX story telling peak. It perfectly captures that "lived-in" realism that kept me hooked for all six seasons and grounded me in how small we are across this vast universe.
To me, this is perfect!