I'll give you a self serving example of what I find is a better measure of one's ability to execute. Which I think is what you're after.
I played my Wednesday league last night. ...and got caught up in a little cat'n'mouse safe battle. The other details of the rack are moot, so I'll focus on the shot that broke the stalemate. My opponent left me what would have been an effective safe generally speaking. I did not have clean pottable shot. However I could see nearly all of one OB and it did have a clean path to a pocket. Pretty typical long pot playing 8. Roughly 4ft to the OB and another 4ft to the corner. However I could not directly hit the OB at the necessary angle due to a slight obstruction about a foot away. I was also limited to pocket weight spd as the cut angle would have funneled me to the wrong side of the table otherwise. So that means I can't jack up and pop the CB over the edge of the obstruction and I can't play a traditional masse'. Not that I would ever play such a masse' anyways. What I could do is aim to miss, swerve it back to hit and throw the OB on the correct path. However this would also only work if I judged the amount of squirt and subsequent swerve around the obstruction correctly. Bearing in mind, pocket weight spd.
So there's a shot that requires not only speed control, but execution of the correct amount of english (stroke), aiming with the subsequent squirt of that applied english to miss the obstruction, while factoring in the amount swerve, all to generate the necessary throw. It wasn't flashy, it didn't pop 3ft in the air and squat on a dime, it didn't come off 5 rails. ...and no one watching had any idea what went into successfully making that ball. Maybe if we were playing with a measles ball they would have wondered.
My point..., power isn't necessarily the best measure of "arm talent". I know the shot as explained above sounds more like a description of shot IQ. However the tires have to hit the road at some point. Executing the above is a credit to a player's ability to put the tip of his cue at the exact spot on the CB while controlling the pace when he does so. IMHO, finesse is what has been missing from the prop shots we've seen posted thus far and given praise to as good examples of what "arm talent" is.
Anyone can hit something hard. The majority of bangers can apply ridiculous amounts of unbridled english. It takes talent to break a horse and make it do what you want on command.