I think it really depends on what you want to accomplish. I'm still a beginner, and it's taken me a while to figure out that I'm a slow player. I just don't know enough about the game to be able to quickly move through all the steps. I don't think you get to shoot at the speeds you see better players shooting at, if you don't have the same amount of information/skill/and familiarity with the game. You CAN shoot as fast as them, but you're going to be terrible, because they already know the game, and you don't.
For example my routine for each shot is for a rack of 8-ball.
-Determine what is the best order to run the remaining balls in.
-Identify problems and clusters that I need to break out, and what is the best way to get shape on balls that will help me solve those problems, as well as making sure you have an insurance ball.
On a shot to shot basis:
-Determine where I need to go to get on the next ball, and figuring out which is the best way to get shape on that ball. Determining which is the right side of the ball to get shape on, to get to the next ball, and trying to move through the positional zone, instead of across it (usually involving multiple rails).
-Determine what english I need to use, how it will effect the ball, exactly where I want the cue ball to go, and how much do I need to compensate for throw.
-Pick an exact spot I can legitimately get to (I know for a long time, I thought I could get the cue ball to do things that weren't legitimately going to happen physics-wise.
That's just the thinking planning portion. Now comes the execution:
-Line up the shot line, and making sure my back foot is on the line when I step into the shot. I've been learning CTE, so there's a whole other bunch of steps I wont get into.
-Land, making sure that my bridge arm is as straight as possible.
-Make sure that my aim looks appropriate before I even start my warm-up strokes.
-While doing my warm-up strokes, making sure that my stroke is lose and fluid and without any hitches, and that I'm stroking at the same spot on the cue-ball.
-Pausing at the cue-ball to get everything to settle before I begin a slow back-swing.
-Pause on the swing, and focus on the object ball before stroking forward, and following through.
-Making sure I stay down after the shot.
I think I missed some stuff but that's the general idea. When you've played enough, this will all be natural, and you won't have to think about it, but we haven't, so it isn't. A lot of stuff actually goes into playing pool, and I don't think making sure your shots take more than 10 seconds, completely covers the complexity of the subject.
I think this stuff is a lot, and if you don't want to touch it, that's fine. So I think for the moment, focusing your attention on trying to have a good solid, smooth stroke would be a better goal, than trying to take more than 10 seconds. Instead, try focusing on pausing after your warm up strokes with your tip at the cueball, nice smooth backswing, pause, accelerate, follow-through-pause.