The entire Harry Potter series so far had more or less the same formula with most of the action happening in and around Hogwarts. As such, it is a bit jarring that the first film the two-part finale doesn’t feature Hogwarts on screen at all.
The decision was made to split the final book of the series into two films. Since I haven’t read the books, I am estimating that this has a lot more to do with the second half than the first, since there is a large portion of this film (featuring Harry and friends on the run) where nothing too much of note happens.
That said, for a film that’s only half a story, there is enough closure at the end for the film stand on its own. Still, I will be counting the days to July when the conclusion is released.