I totally agree that the 217 corridor can generate a huge ridership. Almost as much, if not more than the 33,000/day expected for the 205 corridor. If they configure the Beaverton TC to have cross-platform transfers between LRVs and DMUs, timed to arrive simultaneously, it would provide a virtually seamless transition between vehicles and they can operate as one Red line. Of course we'll need a few more DMUs and double tracking the whole length.
I think the term "commuter rail" is a little off-putting to some people because it implies rush hour only service with 30 minute to 1 hour headways. Well of course, they'll never carry very many passengers with that level of frequency.

But if they bump the frequency up to match the Red line, then it's no longer "commuter rail" and more like 'heavy' light rail.