It doesn't work that way. You only get 128 presets in the form of Hub scenes.
Aftershock only has 6 presets and they are not accessible via midi. The c4 was the first to offer 128 and midi access. This is where your hub will come in handy if you want more presets, or if you want to use it in tandem with the c4 you can program your hub to recall settings on both pedals, including the state of the bypass switch. Helps reduce the amount of programming needed for a song.
So the hub has 'slots' for me to save AfterShock presets to? That's sort of a bummer, though I can handle it by just building 'scenes' for the AfterShock alone and think of the Hub as the AS, though it adds to some complexity with my controllers and isn't the most graceful.
-Is this going to screw up how I use my C4 with the Hub as just a MIDI Host (Like, do I have to unplug the connection when I set my board up at every show so the hub doesn't 'scan the C4' or try to fuss with what I have setup on that pedal).
-Will I be able to use CC from a controller to scroll preset-up--preset down or is that kind of CC not supported.
-Right now 'in the field' edits I do for levels, etc. in the C4 I can save on the pedal by holding down the footswitch. Will I be able to at least function similarly with the AfterShock, or am I relegated to having to use the editor to get things done. Or because the presets are held on the Hub do I have to use another process.
Way easier for many controllers when people are layering in MIDI effects just to drop in a new Channel & whatever PC or CC you need if you're working with patches you already have and use.
The phrasing on the website:
"The Aftershock also features full MIDI capability and simplicity when coupled with the Neuro Hub"
- Preset Saving — Save up to 128 effect presets."
Is a bit weak when it comes to how it works given the C4 also gives me 128 presets when using my hub as a host. But not needing to use the Hub to store and save them.

That should probably be revised given how some of the other pedals function.
I made the decision to put 128 presets on the C4. Seemed silly not to do it. The older one series pedals did not have the same amount of memory.
Time to think about a round of upgrades (AS2 etc., ?) you've got a singular series of pedals that now handles MIDI differently from pedal to pedal which is really mix and match in terms of core feature sets. When it comes to my board which has other MIDI pedals on it, it amounts to me (and others like me) having to use several different schemes of control from a pseudo-MIDI proprietary communications thing to standard commands.