Here's a 9 minute presentation about the HFR from 2016. They explain why they're shifting their attention to HFR as opposed to HSR, why it's the better solution now and compares with similar service in other populous corridors.
• Video Link
The biggest issue I have with this project is that it uses diesel power, again. If we are truly serious about helping the environment, this system should be electric.
In any case, this will be a major improvement to the status quo. This brings a significant increase in speed and frequency. Ottawa might not have a downtown station, but at least our suburban station now has a proper rapid transit connection.
I'm really hoping the Feds are ready to hand over the necessary funds for this project, including the Mount Royal tunnel widening and, hopefully, electrification.