Sorry maybe it was best to leave my suggestions here.

So first suggestion would be to make an adjustment where the hyperlanes dont pass directly over the giant glowing portion of the map. A mini galaxy core, maybe twice as small as vanilla but still present?

Another thing that could be added is wild space corridors between the spirals in spiral galaxy maps. That would make things interesting in my opinion.

Second suggestion is about the wild space itself. What if you could put the fallen empires and marauding factions within the wild space?
It works thematically and maybe allows the Fallen empire to strike at any location rather only whoever has them boxed in.

Final suggestion would be to add more features to make wild space interesting for exampe wild space nebula appear in different shapes?

Add small multi system islands within the nebula? Perhaps more story could be added about fallen worlds there? With more archeology?

Make wild space have a more likely chance of spawning special events like leviathans or ancient fleets?

Some of these things you already have them on your to do list but I though to mention them anyway.

Would it be possible to add compatibility for Zenith of Fallen Empires, specifically to your crisis event edits? It's as simple as changing a few lines of code, specifically mentions of "is_country_type = default" to "OR = { is_country_type = default is_country_type = ascended_empire is_country_type = lost_empire }". You can look at the crisis event files in ZOFE to see what I mean.

@spider - I'm not really satisfied with the fix in those files at the moment. I've got a work around which I hope / should mean I don't need to overwritr anything at all. Just need to find time to write / test it.

I'm unsure how much coding would be necessary to get this done, but would it be possible to make a policy that allows you to freely attack any fleet within Sea/Unclaimed space? This would allow more militaristic empires to really take advantage of the neutral zones and drive a galactic push towards establishing and creating safe Gateway networks.

Wild Space Whales to Wild Space Sea! Some systems which generate spaceborn creatures would be nice

Your mod sounds a good idea, a suggestion for the future : a new starting system in an island system with custom origin, maybe a few lore ? Like a civilization that access space without observing anything else that is doesn't in his nebula (like a isolated star cluster) ?
Be crazy : a custom species of your own ! :D
You have my entire support, this mod increase the reality of this incredible game !

It would be cool if you could create a war game (fake war) in Wild Space to determine things like whether or not someone becomes a vassal or force a resolution through the Galactic Community.

Creating preserve Stations that prevent people from killing wildlife in a system and granting causis beli if someone destroys it.

About the only thing I can suggest that would make this mod perfect in my opinion would be built-in compatibility with Gigastructural Engineering, specifically the core systems. GE adds endgame events involving the Galactic Core, but when they spawn it becomes an ugly mess of hyperlanes when combined with your core systems.

I for one would love a Wild Space 'buffer' zone between my gigantic laser of death and the federation of nations that want to destroy it, lol

Definitely on my to do list. In fact was trying to do it this evening, but ran out of time!

You wrote about having plans for hyperlanes in the future. Could this mod be considered in a compatibility patch? https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1733757326

Another Compat recommendation, no idea how compatible it is out the gate but I imagine not 100%:
Aesthetic Cinimatic Gameplay. Been using that and enjoying it quite a bit. Bout to install this for my next run and see just *hoooow* much it borks stuff xD

I've used it with ACG before and seemed fine. I think its also listed as compatible on the ACG mod page.