Certainly getting defense also into the RAS based on the RS push will greatly improve batting, as then you will have 3 options by just having you hand on the trigger instead of just 2 options by having you hand on a trigger as it is now.
For example with RAS controlling both defense and drives, im having my finger on Attack trigger, depending on the ball i can go through with lofting it or leave the trigger and just pushit to long on or defend it.This will make the batting experience/as well as judging so much closer to real life.
Ideally i would get the defense trigger to work as Leave button and im sure The Batting controls will go GOLD.
Having this kind of system will greatly enhance batting experience.
Only thing i doubt is how well we will be able to control the RS stick( especially for behind the wicket shots, all the analog stick based control games so far like Golf or baseball mostly involve forward swings not backward one so that's one area im a bit doubtful about implementation/ how well users will be able to control it) and it has to be implemented in a way we feel in control in going between defense and drives, on second thoughts it can be a bit dodgy as well as it will capture the real life cricket were batsman or unsure on defending or going for a drive and end up nicking or scooping to the fielder.
If implemented rightly it Should be the batting controls for iterations of DBCs.