i pretty much stole the Ender Soul Core from Natural Pledge's Ender Actuator ^^ the main difference is that the ESC costs mana per-item to use, which.. is an "eh" tradeoff imo, and massively complicates the implementation
The other day I was thinking about the "categorizer" style of vanilla sorting system (ex. Cass of Maizuma Games's excellent design) and got kinda bummed that corporea doesn't seem to help you build one!
First, you need to collect items of a single type and feed them from the player-facing input to the categorizer input. But corporea funnels only let you pull specific items, not "any item".
Next you need to determine what category the item belongs to. The standard trick is having the category chests emit comparator signal strength 2, putting the item under test in a hopper minecart, then driving it under the category chests and seeing which one drops to signal strength 1. The obvious analog here is using a corporea funnel to remove the item from the category chest instead of a minecart, but the problem is that as you run the system you need to request different but specific items, which requires changing what item a corporea funnel is programmed to, a thing you can't do.
Next, you need to return the removed category item to its appropriate category chest, in vanilla this is done by driving the minecart back over a row of hoppers w/ only the selected category unlocked. And then sort the rest of the items into the storage slice corresponding to the selected category. Replacing these actions with a funnel has the same problems, depending how you implement this you'll either need to pull arbitrary items from a chest, or pull a specific-but-changing item.
I think "pulling arbitrary items to a location" is technically solvable in today's botania using the "retainer pingpong" mechanic to bounce around an "all *" request? Imo this mechanic is a little too obscure, and these days the max request size is only 65535 items so it will eventually consume the request. A corporea funnel that could pull any item, or at least "any item from a specific set of chests" (like by pulling random items from the network, or Incorporeal's Red Stringed Liar) is a more direct solution. Exposing/tweaking the pingpong mechanic would also help - the mechanic is clear as mud, I wish you could visualize the contents of a corporea retainer.
Also, being unable to "reprogram" funnels (and interceptors, and crystal cubes) is a big obstacle to making high-level corporea systems, since you can't make anything capable of abstracting over different item types. I tried to address this from a couple different angles in Incorporeal; there's a Frame Tinkerer but I think it's clunky (some kind of "Red String for item frames" sounds better), there's the Ticket Conjurer/Solidifier/Sanvocalia ecosystem for things like "bottling up a corporea request and shipping it through a nether portal", and every season has tried to include a "computer" mechanic for directly manipulating the contents of corporea devices and performing programmable requests but I have never been really happy with any of them.