Footman, CrazyPill didn't add effects to the models. As far as I understand, he only came up with the idea of importing models using plugins from Blitzkrieg. And adding models with effects is still relevant in some cases.
Once again, the point is not that there are more possibilities somewhere else, but that the possibilities that exist here are quite sufficient for creativity.
You can add a model with skinning to the game. You can add animation. By the way, a new animation that can be considered original still implies creating a new skeleton. All sorts of mix-and-match approaches among animators are not appreciated at all.
The problem is that using only other people's work, you don't really learn anything useful. And it gets boring over time.
To see that your "revolution" is actually a very simple thing, you can just look at the import guide and do it yourself in half a day. It's simple.
Hannik, without much experience in modding, tried and already managed.
But if we talk about it in more depth, yes, motivation for people to create their own is very good, but firstly, for what purpose? In my opinion, such motivation needs a clearly defined end goal. Secondly, are there enough people in the community who will be able to independently create something comparable to at least the level of the developers?