Hi Chris and welcome to the forum. Obviously you have been doing your homework! There have been some changes, yet some of the items you mentioned are extra cost options.
First the changes: The hatches have changed and are in current production. They're easy to spot because they have one twist top (instead of two) and are hinged. The Twist & Stow rudder system has always been part of the Adventure. There is a minor modication to the system (currently in production), that the dealer should be able to install if you need it. It is an internal part you cannot readily see. I think anything delivered with the new hatches will probably have the rudder mod. also.
Now for the options. The Adventure does not come standard with the "Large" rudder or the Turbo fins. The rudder may be ordered separately for about $23. The Turbo fins come in a separate kit and are not yet available (due any time). You may back order them (pn# 72065) for about $80. You can order these any time, but perhaps you can get a special package deal if you buy them with your boat!
As you probably know, there are two versions of the Adventure. Both boats and basic equipment are identical except for color choices. The Adventure "Fish" comes with some fishing accessories (anchor, cooler and towing wheels?) and costs about $100+/- more. Other options: sailing kit, daggerboard and a few other toys.