EFGEN - Allow Active Point Trigger Based on Specific Value/Logic/Calculation

Using EFGen, currently an EF can only be triggered based on the zeroth state of the Active Point. This makes is impossible to trigger different events based on specific values of a single PI Tag. I am trying to implement a batch structure using Event Frames with production run as the parent and different phases of the run as children. I have a single PI Tag that lists the current phase of the run in real time. It would be nice to be able to trigger the phase child events based on the specific string values of this tag. PI System Explorer has the ability to trigger EF's using Tag values/logic/calculation, but it lacks the EF structure capability. There are workarounds for this issue, but they are too messy to realistically implement with ease.