I don't think Korver would be as effective playing big minutes with the starters with the Favors/Gobert frontcourt and Mitchell currently piling up bricks from deep so far this season tbh. Reason why it works more for Ingles is because he's also a threat to put the ball on the floor and get to the hoop, or to create for others so if they close out hard he'll go past them and go to the hoop. If Korver can't get a shot off after a dribble or two he's pretty useless and will look to pass it off ASAP, and with cramped spacing he'll struggle to get consistent clean looks compared to when he comes in at the moment and Crowder usually joins him which instantly opens the spacing up with Favors off and Crowder on one wing with Korver on the other. Gets even better when the fun bench unit comes on and he's got Crowder and Ingles on the wings with him and Favors who can space the floor a little in the midrange area as well.