Several observations from this whole mess.
1. Dorner did not plan any of this beyond the initial shootings. He had neither well-planned egress routes nor a series of offensive actions. He executed his last actions on this earth like the rest of his life: plodding along with periodic screw ups to punctuate his inadequacy.
2. America and America's LEOs have yet to face a threat that is both smart and determined to put a hurting on LEOs or authorities.
3. American LEOs, if they are the object of some violent criminal, will shoot up and burn down and smash into people and property indiscriminately in fear and rage. Best course of action for the rest of us is to steer clear. For my part, if something like this went down locally, wife & kids are displacing to grandpa's house eight hours away.
4. When America's LEOs finally do face an adversary that is both smart and determined to put a hurting on LEOs, a lot of LEOs will die. They are not very good at this sort of thing, when all the odds are not stacked in their favor. We have had indications of this, most especially SWAT/tactical teams without a clue regarding sound tactics, techniques, and procedures. Presumably, those SWATties are the best in that department. If they are not up to snuff, the average patrolman is not likely to be accused of adequacy. (Now, some tac teams in some jurisdictions are good, some are very good. They look like the exception, though.)