Expediting Express Requests - comment by SarathyG

Hi Carrie,
In a senario, where we have set EnableExpediteExp = 1 and AWTs have been reserved, and we have many workloads defined under Tactical, then my understanding is that, Tactical queries are likely to be highly impacted due to high request rate for work09, as tasks from all type of workloads will compete for work09 resulting in flowcontrol ?? 
For EnableExpediteExp = 2, am able to understand the clear benefit as its extra perf booster for tactical queries(alone) in terms of parsing.
What will be the ideal senario for using EnableExpediteExp = 1 ?