South Korea will likely need to build on their form when they travel to take on Lebanon in World Cup qualifying, despite scoring eight on Thursday.
The Koreans top Group G in AFC's second round of qualifying for the FIFA showpiece, although not by any definitive measure - with Kuwait matching their six points, and plus-10 goal differential.
"I think highly of him. Since he was first called up to the national team, I think he's matured a great deal," Stielike told Yonhap News Agency of Kwon.
"I had great opportunities thanks to my team-mates. Our goal was to score a bunch of goals, and everyone played a part," the 21-year-old said.
"I was able to relax and just play my game, knowing my teammates would be there to help out."
Kwon scored the Koreans' third and sixth goals, and was goal-for-goal with Son Heung-min before the latter wrapped up a hat-trick in the 90th minute.
Miodrag Radulovic's men are third in the group on three points, having joined South Korea in dispatching with Laos 2-0 in June.
That win over Laos was Lebanon's only success since March 2014, and South Korea will be looking to double their fortunes on the international break and put some breathing space between them and Kuwait in the standings.
