An option is to define 2 lines: the fast line and the slow line. The slow line you configure it will stop at every station, and for the fast line you construct bypass tracks at those stations. A typical setup for a station like this is a straight double line with at both sides a single track station placed along side to it. The straight track is the shortest, and so the pathfinder will select thos tracks for the fast line. The slow line is forced to go by the platforms.
It’s just an idea, a compromis as long we do not have waypoints.