1. It's not a big deal since I don't play much doubles but it would be nice to have this option maybe for TE4. I like the dynamic camera mode with lowered height and full aperture, which makes me feel like i'm in the game
Also this way you get a better feel for the height and speed of incoming balls.
3. For training, i think if you can add a ball canon that shoots the ball towards the player (different shots, speeds and directions) is better for volleying practice . Also maybe another mode just for service practice.
4. TBH I don't know what exactly should be improved for net play, but at the moment it feels a little clunky and cumbersome. My problem is that I can't volley consistently and reliably. Even after playing so much and practicing a lot, i still feel like my net play hasn't improved much. I think the problem is that positioning is very hard in front of net, since you can't stretch your body to reach the ball and instead you always have to take some steps. Since there's very little time to adjust your position it results in some rather easy misses.
I've seen some of those long volleying rallies especially in doubles, they're pretty funny though