I don't think I'd like to see a two-week break in the season. Take 6 weeks to get in shape, play for a month, then take two weeks off? Not in my opinion.
Instead of replacing the AS game, return it to its roots when it was a must-see game. Just the best 25 players.
Baseball is a game designed to be calm. The beauty of the game might be the minutiae. The WBC is great, but some of that greatness is the contrast to the regular season. If I had to add one thing, I'd give every team a honorary captain. Imagine making Tony Oliva the honorary captain for Cuba, or Rod Carew for Panama.