Pretty much everything in Cascade is broken, however what you are asking wouldn’t work anyway. The reason is because the LOD’s for particles stick after they have been spawned. So if you are 100m away from the effect and the mesh particle is 4 polygons, then suddenly the player moves his camera up to the particle from 1m away, that “LOD” isn’t going to be switched UNTIL IT’S RESPAWNED. Ie. what you are asking would work (in theory, if wasn’t broken) if the camera moves very slow in your game of if the mesh particles have short lifespan, but for many cases your workaround wouldn’t be recommended.
In other words, “I added LODs to the static mesh but Cascade doesn´t care about them” I wish THIS was fixed instead, would have been awesome.