I think the phaser shots by the Enterprise were actually more realistic in Doomsday Machine.
I've seen lasers in real life and (though we're talking phasers, they should be similar) and they move so quickly they are simply there one second and gone the next. Literally on/off.
Most of Treks phasers effects have been the "energy beam pouring out of the ship" variety. Where you can actually watch the beam as it exits the Enterprise and heads toward a target.
That would never happen in real life. Though then again, in space you can't actually see beam weapons when they are fired (or so I've read).
But the "strafing run" is not consistent with dialogue.
The dialogue indicates that Decker was going to take the Enterprise in and hit the Planet Killer with "full phasers at point blank range".
Like I said, I might've like to have seen two additional angles of the Enterprise firing on the Planet Killer, but the strafing run sounds ridiculous