There is a click action on each image in the gallery already, and an option for a link in the title.

Mega menu out of the box would be nice

Also, I'd love a masonry layout, so the photos don't get cropped to a specific size/proportion. Would be very useful for portfolio sites.

Useful for making affiliate sites.

Also, option to upload a picture for personalisation, so people can upload their photo or hand/written message.