1. Commentary: While I think it's improved and changing broadcasters would be counterproductive there's room for growth here. I think the underlying system is more of a problem than the announcers themselves. The issues I mainly have is that baseball commentary is more like telling a story and that is missing. Each at bat feels disconnected from the game as a whole and each game feels disconnected from what else is going on in the league or how the teams/players got into the current situation in the first place.
2. Presentation: I'm someone that likes the slower pace of games so I don't play with quick counts and don't really X through cut scenes. The Show leaves cut scenes on one thing for too long. There should be room for short replays of the previous pitch, or cuts from batter to pitcher to runners like there are in real life. While not really speeding up the pace it would feel more authentic and interesting.
3. Franchise Improvements: Stats, oh my god, stats. WAR, wOBA, etc. and track them from year to year. We're well past the 1940s, let's track more from year to year than the Triple Crown stats + steals. CPU roster handling needs a lot of work as well. In next gen shouldn't we be able to store spring training and postseason stats instead of wiping them as well? Give us more splits!
4. Franchise Immersion: While I understand the technical limitation of why we're not likely to see a highlight show (maybe ever), there's enough to talk about in baseball without showing anything on the screen that a MLB Now type show could work. Even something like EA did with Tony Bruno back in the day with a radio show playing over the menus would be a huge improvement. In general, anything that helps the player feel more immersed in a real league instead of just playing game after game in a bubble would be very welcome.
5. Stadium Experience: Two versions of the retractable roof stadiums is important. I'd personally like to see fans in the Park at the Park at Petco (but I'm biased
).
6. Animations: I don't have anything specific to say but a general improvement would be great. The Japanese style swing still needs some work as well. I think it's time to get some umps in to mo-cap and update the umpire animations as well. Speaking of umpires, for the love of god fix their positioning!
7. Uniforms: Update them throughout the year with patches, etc. I know hands are probably tied by MLB here, but that would be nice. Persuade them that people want authenticity!