Vanilla XCOM crafts w/o soldiers in them will automatically just wait when they reach a landed UFO and immediately engage it when it takes off. With craft that has soldiers this is impossible, and with OXCE's crafts often requiring pilots this means its impossible to engage UFOs as they are taking off. It would be nice if there was some kind of feature for piloted craft that would re-enable this behavior. You can manually patrol above a UFO but then your craft doesn't actually auto-engage the UFO as it leaves and since there's no warning it often gets away unless you're really paying attention on minimum geoscape speed.