I still think, especially for being a PS2/Xbox game, All-Star Baseball 2005 had some of the best commentary. Yeah it was a bunch of the same audio too but it was situational. For example, you have a guy on the trading block, they recognize that in the game. If teams have been trying to trade for a player they announcers talked about that. If you traded for, signed a free agent or brought up a rookie to fill a certain role (speed, leadoff, power) the game recognized that and commented on it.
I remember doing an expansion team and two seasons into the game I traded for I think Pat Burrell because I needed some power. Took a risk and traded my 3rd starter too. The game actually recognized that and in my first game after the trade discussed that when he came up to bat, even recognized that I took a risk in trading a starting pitcher too because as they said "we didn't have a lot of depth to back it up." The trade didn't work if I remember correctly lol.
Anyway, I'd always wished The Show would add in commentary that reacted to events in your world. Recognize when someone wins the MVP in 2017 as opposed to being in the year 2018 and they still refer to Miggy as "the MVP." Just more recognition about what is going on in your current world. Hopefully with the PS4 they'll be able to do more of that in the future versions of the game.
Still excited for the game but sad to hear it'll be the same old commentary.