I would:
First off, add a sign signifying Pirate's Cove. Because anyone who's never been before could easily think this is just another part of Market Square. Also, I would slightly refurbish Sea Storm by giving it an LED Sign for the queue time, a proper entrance and on-ride audio with themed announcements.
Refurbish Dragon's Fury by building a new queue, theme tune, and adding in loads of new theming, like a 'Dragon's Lair', which would be something like a pit with smoke, fire, sound and strobe effects.
I would replace the theming on Dragon Falls and make it better at the same time.
I would add audio to all the bits of the park that need it, I.e. Vampire queue line, Land of the Dragons and Pirate's Cove.
I would add a new themed area where Santa's Grotto is. It would be themed around the Arctic (continuing the parts of the world theme) and would feature a family Mack MegaCoaster.
Finally, I would retheme Tomb Blaster to be linked to Rameses. Maybe the story of why Rameses wants Revenge? As when I first saw this ride, my first question was "Why does Rameses want Revenge?"