Using the latest DH 2.3 Nightly Build as of this morning (abcb2a3a). F3 menu shows that the server has DH support, but LODs do not seem to properly render (see the artifacts in the unloaded chunks). When flying around in creative, LODs do not save or render even in previously visited terrain. Configs for both the server and clientside are default. DH works in singleplayer worlds.
Interestingly enough the LOD pregen and stuff works for someone else on the server, running the exact same version and build as I am with the same modpack. We're both using Complementary shaders. F3 menu shows 'Server has full DH support'.