The single biggest element to expanding MTTs is late registration imo. I know that it's not entirely SWC's fault, but it boggles me that there's major poker software that doesn't have a feature that has been possible on every poker site I've ever played for over a decade.
I actually love this feature. You know, when the tourney starts, if its an overlay, how many people in it, exact payouts, etc. I wish more sites would have this.
To echo others, it's extremely frustrating to sit down for a session and see one tournament that I'm actually interested in playing...but I missed registration by one minute. It also ends up keeping prize pools down and keeps them from upping the guarantees. Also, I'd be fine with the suggested 10-15min registration, though I'm not opposed to an hour. I also agree with the sentiment that WPN's 4 hour window is crazy/terrible.