I don't know that I have often been bothered by a lack of understanding what was happening on the field. My nephew, now deceased, was at the Pine Tar Game, rooting for the Royals in Yankee Stadium, when Brett hit the home run but was (at the time) called out. He said he had NO idea what was happening. The PA announcer didn't explain anything; it was just Brett hit the home run, there was a big fight on the field, the runs came off the board, and people left.
At Wrigley in the old days (1980s) I had a lot of trouble following the game. The PA announcer made few announcements, and there weren't any boards or anything; if you missed the announcement of who the new pitcher was you were shit outta luck, pardon the expression. But with those exceptions. . .well, there's a lot of information floating around. In the last 20 years I don't know that I have ever felt I needed more information.