I spent the $14.99 on Grand Prix too. I thought the coverage was spotty at best. On demand was not posted in any timely manner, and then usually just "day 2" coverage (etc.) and no breakdown by event. Not sure I'll give it a go for Worlds.
I would have to say that for $15 bucks, I was very satisfied with the Univ. Sports GP coverage. The viewer wasnt the easiest I have ever used but once you got to learn how to use the detailed lists of what was available, you could watch the coverage with or without commentary at your leasure. It was easy to fast forward through the spaces left for commmercials for the stuff that was broadcast. The human help section was very good in learning the tricks. Sometimes I had to e-mail them twice to get a point of usage clarified but once I learned it, it was OK. It sure beat the heck out of no coverage. If you have good hi-speed internet, the quality is fine.
Many of us do not need commentary at all.
In the early days of Sports TV, single sports (like Golf) would have commentary for the uninitiated to understand. Thus, commentary came to FS for the same reasoning. It had merit and it was done like a whisper. Not like Hamilton screaming out she just did a triple toe in a screechy voice.
I haven't seen competitions on computer from UniSport, but if that gets me to see the whole comps, it will be worth it with or without commentary. It would be great LIVE, and I can watch it excerpted on regular TV later.