I went to now Disney Hollywood Studios a few years ago, and there was enough shows and rides to fill well over a day, but looking at the park's opening day attractions, it's crazy how few there were.
The Great Movie Ride
Studio Backlot Tour
The Monster Sound Show
The Magic of Disney Animation
All shows in the Theater of the Stars (Where Beauty and the Beast is now)
Show Biz is
Later in the year (1989) Star Tours and Indiana Jones Stunt Show opened up.
Is it just me or was that a tiny amount of attractions for opening day at a park?
Obviously now the park has added many many more attractions.