Weeding out a bunch of photos is easily done be selecting multiple photos and clicking delete. Nice.
But as you are selecting, it would be really nice to be able to open a photo for viewing. Currently you cannot view a photo if any are selected.
I would very much like to be able to open a photo for viewing while having a selection, and having the selection retained while viewing the photo. Maybe even having the option to add/remove the currently viewed photo to the selection.
This would also be very helpful when selecting for an album.