That's probably as good as it's ever going to get.
Its not as good as it can possibly get, but you cannot reasonably expect the best possible outcomes as something possible to produce on demand.
Look at the mass shooting, that wasn't, in Charlotte at the end of May, this year. (about the 26th or so).
A guy with an AR-15 opened fire on a block party. A woman at the party, not a cop, not private security, just an armed citizen, drew her pistol and shot him, DRT. NO ONE ELSE was shot. Only the would be killer. Serendipity that the would be killer didn't hit anyone before being stopped, but it did happen.
Never forget that the bad guys ALWAYS have the element of surprise. THEY choose where, and when they open fire. The very best possible is that someone reacts and stops them before they actually harm anyone, it can, and has happened. But you can't count on it happening, only be thankful if it does.