Yep, exactly. And considering the time frame, Skyrim has seen a good quota of quite impressive mods.
We already have quite a few overhauls - PISE/ASIS, Wars in Skyrim, Skyrim Monster Mod, Tytanis, etc. - all of which are still works-in-progress, so no surprise there hasn't been an "FCOM" to get a smoother balance between them...
Quest mods have been slowed down by the navmesh bug, but it looks as though 1.6 will get rid of that obstacle

Open Cities has been around for a while now, but again progress was hindered by the navmesh bug.
Unique Landscapes isn't needed as much with Skyrim, as Bethesda did a really good job with the vanilla landscape.
Advanced survival mods such as Frostfall have arrived for Skyrim much sooner than they did for the earlier games.