Very nice!
I really like how you’ve integrated vehicle parking on ground floor!
But am I blind, or do you really not have built any shops/cafes…?
Nevertheless, I would really like to see it “in action”… perhaps you could provide additional information, after opening it… 
additional, more detailed, feedback (feel free to ignore it ;-) )
In general, I love your design!
And on my next project, I will definitely use the convey belt system, you’ve chosen… 
I see these difficulties when operating this airport:
- not enough boarding gates - I just extended to 3 desks per medium stand to speed up boarding
- no shops/cafes/toilets in departure area (at gates): pax will run away to fulfil their needs and be late for boarding.
- no staffrooms in departure area (at gates): PSAs are generally tending to be late, in big airports, lots of staffrooms near boarding desks can help a little…
- 17 medium security are imho not sufficient for that much stands - according to how tight you’ll schedule your flights, even with 2hrs time spread I’m afraid pax will queue very very long, here…
- not enough runways: 2 runways will not be sufficient, if all gates are open: I’m operating actually 16L+25M stands, meaning 41 planes, on 4 (!) runways and its just working. I assume your runway entry/taxiway design is better, but nevertheless I think all stands (auto-planned, 120mins spread) won’t work…
Just my 2cents…
Looking forward to an update how it is going with operating this airport! 
PS: You can see my actual huge airport here: Feel free to comment mine, too…
Another "monster": 69 stands (16L/53M) half opened serving >39k pax