The thing is once you can counter KS's attacks, he becomes wary and tentative. Good anticipation and superb defence are necessary to beat KS. And Son WH is a solid player, not very creative nor deceptive, similar to Chen Long's style, perhaps a slightly lesser version.
KS is always looking for attacking opportunities as well as creating it but SWH knows it and is minimising it.
Thanks to Hawk-Eye. I'm very much hoping IRS will be implemented in more and more courts in major tournaments.
I think KS will feel he must go all out attack in G2 but if he's too impatient, it may backfire on him.
KS felt he must go for the lines and do a little bit extra, hence the increase likelihood of error, no thanks to Son WH's solid play and almost error-free game