Yeah this was my issue, I had assumed the same thing. The Pirates announcers did what they always do for every ST game (interviews and what not) and really didn't act at all like this was any kind of special event - as has been noted, most of the guys barely got their names mentioned, if at all. Just another ST game. The way MLB has promoted the hell out of this series, I was expecting a lot more.
Put another way, after that experience, I'm not going to bother watching the rest of these games the next few days, and I had planned to check most of them out. Hopefully MLB gets the broadcasting part of this together in the future, because the idea overall is a really good and fun one.