Can you show in video tuts? How to fix it.

Easy tip if you are paying a Zbrush subscription and actually know how to use Zbrush :) 
Don't take it badly, I know you're trying to help and I'm sure this process is extremely easy for someone who can handle zbrush... but yeah in the case here we would just like a really easy solution that doesn't involve a thousand (expensive) external tools.
A Video tutorial with Daz/CC even 3DXchange could be nice. Worst case with Blender (as it is free) 

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I now made Feedback Tracker ticket on this item

https://www.reallusion.com/FeedBackTracker/Issue/Daz-G8-Eyelash-Distortion-via-Transformer

That's the exact same problem I have with Unity and their dev process... too many projects and core things/bugs aren't taken care off and too many new features are dropped in "beta" at the same time.
I'm new into the RL world and I'm really happy with most of it, but those Eyelashes issues are really annoying.

I spent 3 hours in Blender fixing the 3 main morphs (Blink / Blink_L / Blink_R) and of course not a single eye look the same once morphed now, it's ok-ish for the style I go with (not realistic) but the time wasted is huge. Pretty sure a Blender expert would fix that in 15mn max.

Now considering I'll have to do this for any Daz character is a bit depressing to imagine.

Yeah, it's pretty disappointing that these sorts of bugs often seem to go unresolved by RL. I think, as others have stated elsewhere, they've bitten off more than they can chew with all of their side projects (Headshot, Unreal Live Link, etc.), and certain core features, such as Transformer, are being neglected.

Quick update:

Issue is the same with eyes size morph slider set to the minimum in Daz

I can try with the smaller eyes in Daz but I doubt it will help, I think it's because of the shape or something I am not sure. I just hoped that Transformer could take care of the Eyelashes in a better way as it seem to be some sort of weight painting issue (not sure how it works of course)

Here is the original model (character is from Toon Generation G8F from 3DU (https://www.daz3d.com/toon-generations-essentials-for-genesis-8-females)
Eyelashes are Genesis 8 Female original mesh 


Once imported in CC3.22 and simply set the eyes to blink, sure it doesn't close entirely (can be fixed through 3DX) but you can already see the main issue: 


And just for testing of course I tried to apply the "Correct EyeBlink" from the modify menu:


So I don't know why it deforms so badly, I tried to fix it in Blender with my poor skills. While the eye lids are super simple to fix, the Eyelashes is another monster that I can't manage to fix in a simple way...
I never tested before version 3.22 as I own Character Creator for a month only.
I tested with FBX version 11 and 12 as well

right , he wrote about it , oops
Did you try to import from daz with smaller eyes and enlarge the eyes in CC ?
You can enlarge or form the eyes and click the bake button , then enlarge it more ...

No, it's making the issue worse actually, as also stated by the original poster here