we now have at least two different cricket games that encourage certain bad habits [t 20 and 50 overs] when it comes to test cricket. the obsession with hitting the ball in the air to try and score sixes. i would sugest a change in the rules for all 3 games, chnge the scoring of fours[ along the ground to sixes and hitting the ball over the boundary rope in the air to 4 not six. this in my opinion would encourage hitting the ball int to the ground[ reducing the chances of being out caught] this is not going to eradicate bad technique [hitting the ball int air entirely] but will go some way towards it.
it will encourage [perhaps] the use of lighter batsscoring fours [ which will now be sixes]
of course their are other aspects of bad technique that have crept into test cricket batsmanship, inabilty to use feet to get to ball
finally make Boycott the england five day test batting coach.