I know you're talking about fielding specifically in your post, but I think first-person view would be awesome for pitching and for hitting as well. And not just in RTTS, but in all modes. It would just make everything feel a bit more immersive and organic. It would be really cool to get the subtle head movements into the camera reactions to the plays, pitches, all of that. It would do a lot for immersion and really be different from the very rigid tv camera movements that are in the game right now.
If you're interested, somebody put together an awesome "almost" first-person hitting camera. It's great. Check it out...
http://www.operationsports.com/forum...ghlight=camera