First off, I wanna say that this is by far my favorite combine Nexus map on the workshop, most stuff that I wanna say has already been said but I'm gonna say it anyway.

The citadel with all of the lights looks really good. I like little details like the broken vending machine in the (entrance hall?, lobby?, I don't know what to exactly call it). The lack of destruction and the fact that there's alot less Combine stuff around the place makes it feel like an alternate universe where the 7 hour war never happened, humanity was peacefully integrated into the Combine empire and the Combine (probably) isn't evil and doesn't strip Earth of it's resources, I feel mixed about that idea but I do gotta admit that it makes the map feel fresh, although it could use some more Combine stuff like generators and an armory on the inside, this is still supposed to be one of the Overwatches HQs in the city after all.

Now to what is by far my biggest problem with the map, the ai nodes
If you didn't know, a guy called Cpt. Hazama󠁳󠁳 (he's pretty well known, made a lot of npc mods, his own npc base, and the expanded nodegraph editor (wich is pretty good btw, I use it all the time)) has made an ai nodegraph for the map, he's deleted it since, presumably because it doesn't work on the map (anymore), the reason for it not working (wich he has told me himself btw) is that the nodegraph file is backed into the .bsp wich makes replacing it impossible unless someone were to crack open the addon files and remove the file from the .bsp

You are probably asking "Why is that a problem though? I've added nodes myself". The problem is that, atleast the ground nodes are not that great, it's visible that you've put effort into them for the most part, wich is appreciated. Hell, making nodes at all is appreciated BUT there's alot of problems with them, here's most spots that could use some work or just completely lack nodes/links
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994591744
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994591613
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994591667
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994591709
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994591709
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994594112
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994594796
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2994595634
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2995452406
The nodes being of "not so great" quality in places is most likely because the Hammer tools for noding are probably not that intuitive compared to just noding ingame with the tool. I've never touched Hammer but I've compared alot of base nodegraphs to custom ones and there's a big difference in quality

I've likely bored you alot with these walls of text until now so I'm finally gonna get to the point

I kindly ask you (please pretty pretty please with a cherry on top ) to fix this and make the ai able to operate to it's fullest potential and I have three possible ways of doing so

1. (probably the easiest for everyone involved, though i'm also not 100% sure that it'll work) Make it so the nodegraph is stored in "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod\maps\graphs" so it can be replaced by custom ones
2. Go over the nodes again and fix the issues i've highlighted, maybe check the whole thing again just to be sure there's no more messy spots
3. Ask Hazama for the nodegraph he made (though I kinda doubt that he would agree giving it out) and replace the one the map has now with it (also not a 100% sure if that would work), maybe add jump and air nodes in Hammer since that can't be done with the nodegraph editor.

Have I made this thread way too long for something that's rather simple? Yeah.
Am I sorry? Yeah.
Do I have a father figure? Yes.
Do I have a life? Kind of.