Having good range skill with your handgun out to about 15 yards or so is a must IMO; from there the act of drawing, reloading properly, acquiring and firing rapidly, and seeking and using cover should also come naturally. Your focus should be on where and what the threat is doing and if it warrants lethal force, not what you should do if it does.
Again, lawyers have a way of gumming up the works. Lawyers will twist
any requirement for Concealed Carry to make it more difficult for everybody
to carry concealed.
Also, if somebody has no idea what any or all of the techniques you
mentioned are or does not know what you exactly mean by "cover", they
need to do themselves a favor and find a way to learn the necessary skills.