If I were you, instead of skipping an entire park, I'd hop, and skip certain attractions. I personally love AK, but I think you could easily hit the highlights in less than a day. You can do most of the park during the EMH hours, if that is a possibility for you. We like to combine Epcot with MGM becuase they are so close, but if I had to choose a place to cut, I'd do an AK/MGM combo day. Your 14 year old probably won't get that much out of The Little Mermaid, Playhouse Disney, or Beauty and the Beast. (though I think he might like the Lion King show at AK - lots of acrobatics!) Try using the "teens" feature of the Disney website ("Choose your Experience") to focus your choice of rides. Even at $35, we feel the hop feature is an important investment.
Make sure he rides Spiderman and The Mummy at Universal