4. Show the natives Picard wants to save so we could care about them
There wouldn't have been much of a chance to create a brand new species, and get to know them shoehorned into limited time span of a movie, however having instead of Veridian Three it be a planet that TNG had priviously visited might have been better.
TNG was on air for seven seasons, amassed a big fanbase of its own and was about to go into feature films, surely the series had enough weight behind it to do its first film without a crossover.
In order to work, the movie had to bring in a non-TNG audience.
James T. Kirk is Star Trek.