Similarly with birthdays, although it's quite easy to work around that via their calendar link.
Also, IIRC, all the photos are resized smaller and recompressed, while the full-res versions are still accessible through the Facebook website. This also makes it harder to quit if 1) you don't have the original photos and 2) don't want to live with the unnecessary sacrifice of quality.
Facebook really ought to include the best versions it has of the data you've uploaded, even if it makes the archive size enormous. The option to shrink things should be a non-default option only, since the download might be a prelude to an irreversible account deletion.
Is it not one of their aims to make it always reversible?
Is it? Cases like this [0] make that seem unlikely.