I've been following your updates on Nexus with interest, but honestly can't see having enough time to test run in the foreseeable future (my group isn't interested in starting a modern/sci-fi anything at the moment).
On the surface everything looks solid and easy to use. I especially liked the takes on vehicle rules, damage types and morale.
But really, it would need testing to see what actually works well. Like this one: Nexus is based on the fact that a good Hacker is about skill and not stuff. A good Hacker can do his hacking with crappy equipment just for a challenge. This is the opposite from Shadowrun were it's all about the gear. Nexus makes the Hacker an important character type again."
It sounds good.