Spoilers for the finale:
Delos has the WORSE security system/team in the universe. There are at least two active shooters on the rampage....and you don't notify/shut-down the corporate party?!?!? You still allow people to leave on the trains leisurely ("fifteen minutes until departure") same as normal?!?!? The security guard orders the ROBOT which has just mowed down scores of humans to "drop the weapon" instead of just immediately firing upon and destroying the dangerous rampaging MACHINE?!?!?
We've seen in the real world the very real risk of complacency. For 30+ years hosts have been unable to harm so much as a fly (literally) and they have followed every order given to them by a human, every single time. The worst these security teams have had to deal with in all likelihood are techs misusing the hosts and perhaps some corporate espionage. A host uprising was literally the last thing on anyone's mind. As for why the big-wigs weren't notified and evacuated, did you not notice the scene where in the command center, the man in charge says, "Dispatch QA teams to the gala, then search and destroy teams in the facility," a split second before the power is shut down and they are locked in? Seemed like they were getting ready to do exactly what would make sense, but were unable to. The best they could do was put a part of the facility on alert (almost certainly not the guest areas so as to hold off on disrupting their experiences as long as possible) before they were shut down and I'm guessing most of the security forces didn't know what specifically they were up against and they were almost certainly not aware of the massive casualties being sustained at the hands of the two Hosts. Aside from that, not a single person had a clue what Ford was planning at the gala, especially the reviving of the stored hosts.
As for airstrikes on Westworld, I'm with you in that it seems to be a problem to overcome for the next season. That said, there's so much we don't know at this point; not the least of which is what the rest of the world is like. For all we know, humanity has become utterly and completely pacifist, doing away with all weapons of war. Given the P90's the security team was carrying, I'm guessing that's not quite likely, but the point stands that the options are limitless for how they could deal with such a dilemma.
Still, at the end of the day, I'm not going to complain that this show isn't air-tight in all respects due to the fact that the journey they are taking us on is still quite entertaining and the performances are fantastic. I think it also says something that despite how many mysteries of this show people figured out ahead of time, that there was still at least one, major mystery that I never saw anyone even hint at; Ford's true nature and intentions.