Regrettably, with Eldar being the last faction added into the game, they‘ve gotten the short end of the stick many times. We have plans, but are only just not being executed as part of our prioties.
We have 3 long term initiatives right now, in addition to LP balancing and price balancing, all of which will affect Eldar:
First is the list of things we already have 3D assets for, which need to go through the integration pipeline.
Second is an analysis of missing assets required for the next batch of heroes.
Third: we have model sheets that have a good selection of new Eldar visual cosmetics.
Sure, some form of Steam Workshop integration could add to the 3D asset library, but as you can see from the above list, our backlog is in the implementation, not in creation of 3D assets.