Don't see why this is a bad thread - its something that is actually interesting and new to talk about, and in the other threads its hidden behind other things that come up!
I imagine that in the main game (ie non be-a-pro), keeping will be an automatic thing for most things. Pressing a button to have the keeper catch the ball after every ball would be very dull; but then if we didn't have that and had it for all keeper catches; then we'd know when the batsman hit the ball and so DRS would be useless. So I think that for leaves/play-and-misses and also for very thin inside edges; keeping will be automatic - it'll be the job of the player to work out if the batsman hit the ball. If there is a manual option, then it'll be using whatever mechanism taking other catches uses (in MLB the show; the default is automatic catching, where if you place the fielder right and dive/jump at the right time, there isn't a need to press another catching button, but there is an option for one). For other deliveries where the ball has either been edged or deflected off the batsman in some way, then it'll probably be down to the player selecting which way the keeper should dive to get the ball.
For be-a-pro; I'd imagine that it'll be up to the player to watch the ball, try and read where it is going to end up, and then move themselves to that position and take the catch. It'll be more hands-on than the keeping controls in the main game (as it should be), but not as riveting as some think it will be. That's the aspect of the fielding mechanics that I'm most interested about - I can imagine what the general fielding controls might look like based on MLB games (because they shouldn't be completely different); but playing a catcher in MLB is completely different to the role of the wicket keeper, so I have absolutely no idea what it might look like!