I would leave the configuration as is. I would rip out all of the existing cheap erector set seats. Reminds me of SMU's cheap football stadium. I would rebuild the seating areas with the suites and press boxes at the top. I would go further down the baselines adding more seats. More shade is needed because of the day games, the seats in the sun are unbearable. The roof needs to be raised up and extended over more of the seating area. Finally, we need better and larger restrooms. The current ones are really bad.
I bet this is the direction they go. Adding on with more metal bleachers would defeat the whole purpose. Tear out all the metal bleachers, but keep the rest of the current skeleton. That being said, what do you do with the player development center, coaches offices, and locker room? If you leave those in, you can’t expand to the east. If I had to guess, it will be the same shape but with boxes behind home plate instead of a deck, and then bleachers all the way down 1st base line. Maybe even a deck above the bleachers down the line, depending on how far down they go.
Personally, I would love if they put home plate in the SW corner. Then have a similar configuration to what we have now. That way the upper deck has an awesome view overlooking campus and downtown beyond it.