Have inbound buses skip alternate stops for pick ups. For example, S2 and S4 buses could pick up passengers at alternate stops other than transfer points, to avoid bus bunching.
On busy inbound routes, buses often bunch up leaving a long gap until the next bunch of buses arrive. This happens because the first bus stops to pick up passengers, while the following bus, a few minutes later, goes right past the stop since no one new has arrived. Eventually, the two buses end up next to each other, while the following bus is long behind. If successive buses were designated to skip some non-transfer stops this could be avoided. For example, inbound S2 and S4 buses could pick up passengers only at alternate stops other than transfer stops and S9 stops. Bus timing and loads could be kept more even.