To address your first concern, you are able to update the deck. The submit button appears while the drop down menu is open, but in some browsers it seems to appear over the back button or hidden towards the bottom of the screen, we are working to correct this, but it is still a little buggy. Overall, this is an issue of resizing and refitting for certain browsers and screen resolutions, the best bet is to optimize your screens resolution to view the site.
Next, we are working on swapping out photos.
Next, we understand that some of the cards have incomplete information, and are working to correct this, or at least have something other than 0 appear, such as "Not Listed".
Missing cards are a result of an issue regarding the uploading of the database, a problem that is still being resolved. For instance, when the site first launched a few weeks ago Behemoth from Canada's Wonderland was missing not as an oversite but as a technical difficulty.
Finally, we will consider your thoughts on functionality, however, the cards are already scheduled to have additional information on them, including a place to rank the coaster on a 1-5 star scale, which cuts down on space in the layout to add any more functionality to the cards themselves. In addition, have you noticed the shuffle rides option? This is the reason we require a double click. If you shuffle the rides you can drag, drop, and even throw the cards across the screen. Take a minute to play around with it, it's kind of addicting.
Other updates to come soon. Animations on the front page, a member accessible way to rank rides, a member forum, and games.
Again we appreciate the feedback. Thanks!