Are you sure AoW3 is coming out mid-April? Last I heard it was shooting for March 31.
I can see the draw of pushing back with all the 4X games on the horizon. There's more coming out in the next couple months than I've ever seen. Age of Wonders 3 expansion, Star Ruler 2, StarDrive 2, GalCiv3, Stars Beyond Reach, and some others I'm forgetting. That's quite the list.
You'd likely be the only July release, but I worry that SK will get caught up in Early Access hell. People just might forget about it if you don't play your cards right. That being said, it's the fantasy 4X I anticipate the most. No matter when it officially goes to 1.0, it'll be damn good. So do what's best for sales and if marketing thinks July, then I think July will be enough time to knock it clean out of the park.
What would we see, other than game options, from now until July? Can we have more lieutenants and a rotation of them for each game? Maybe some more exciting city leveling stuff?