This. I like Sonny, think he is a fantastic option off the bench and a good starter against 'lower' table sides where losing possession won't kill you because there's little desire on their part to win.
I agree, he's got a lot of upside - weighed down, unfortunately, by a tendency to make the wrong decision in key moments. It doesn't matter as much against lower sides because we fashion enough chances to win (usually) despite this relative profligacy, but against the big boys, we can't afford it - especially when we're having an off-day and need something, anything at all, to go our way.
Decision making under pressure is a skill which, when it's not innate, can only come with lots of practice getting put into situations where options have to be assessed and acted on in the smallest posible time-frame. I have confidence Sonny will acquire that skill before his career winds down, and he'll be a better player for it (maybe even a world-class player, because he has everything else in his locker - technical skill, pace, finishing, passing, work-rate, etcetera). But time's against the prospect of him doing it in a Spurs shirt - let's not forget that he still has to do his two years of military service at some point before he turns 28, which only gives him another year or so (at max) hanging around in Europe before his return to South Korea (provided of course that he doesn't earn an exemption at the WC or just skimp out of doing it).
Until he gets that skill, though, he's best in instinctive situations - like his finish for the equalizing goal against City. Ball came to him, players all around him, keeper in the center of the goal - no time for thinking, only option was to hit it first time into one of the corners, and he stroked it into the left corner magnificently. That sort of thing will probably be the best we're going to see if we're not prepared to wait for him to stop wasting so many good chances and positions.
