If this post reaches the forums, it means that the MaLign has succeeded in infecting me with their rhetoric and I now believe that I am a sleeper cell. Please do not shoot on sight. Although I can see my fingers moving on the keyboard, I am powerless to stop it. So I may as well enjoy an excursion into The Dark Side.
The primary reason for sting ship escorts and heavy weapons are that the technology available in the Honorverse provides all sorts of avenues whereby attacks -- especially suicide attacks -- can be carried out. For example, one of the attempted assassinations which was thwarted consisted of a suicidal attempt to ram the monarch's armored air limousine with a cargo shuttle. It failed because the sting ships were available to intercept and shoot it down. Handheld anti-air weapons do not have the same kill probability as specialized fighter aircraft, and even if they did, would be useless for intercepting such an attack while the monarch was in flight, since no one on the ground would be able to keep up with them or to provide a moving bubble of protection.
If the Malign chose assassination as a deterrent, how realistically difficult would it be for an entity with so much power and means? I recall how successfully Honor was shot down with a single handheld launcher in HoTQ. How difficult would it be for the Malign to build Q-cargo shuttles with a battery of missiles to shoot down Elizabeth's air-limo. The Malign has the technology to build legitimate Q-cargo shuttles capable of ambushing the limo and delivering an effective attack. Probably won't work more than once. But once is all they'd need. It seems the Queen is much more vulnerable in the air, out from under the protection of Mount Royal Palace.
What are the capabilities of the sting ships. Count?