Picasa Web Albums data API adds more features

Picasa have announced a whole lot of new capabilities in the Picasa Web Albums data API:

• Searching community photos
• Retrieving a user's recent uploads
• Retrieving recent comments for a user
• Searching a user's photos
• Filtering a user or album feed by tag
• Uploading non jpg files (expanded to allow bmp, gif and png as well)
• Downloading the full size, non processed file

Whilst the addition of these is very welcome, the API is still rather patchy. Searching all the photos has been available for a while (though in an undocumented form), but now its documented, why doesn't it offer the full range of capabilities:

• You can search community photos, but only by a the query parameter (no searching by tags for example)
• The values returned are in a predetermined order (presumably "relevance"), but you can't change this to get the most recent updates for example.

Since both of these capabilities are available when searching a user's photos, it would seem logical (and to a degree necessary) to offer these when searching all community photos as well. (Yes, the technical challenges may mean that its harder to offer this facility for all photos compared to just a single user's photos, but after all Google is a search company, well used to solving tricky search problems).