Would there be any downside to changing between cap or helmet? Like some sort of adjustment period (perhaps only when moving from cap to helmet).If not, it seems that e.g. if you were facing a spinner at one end and a fast bowler at the other, the best thing to do would be to constantly switch between wearing the cap and helmet, which is not something that would occur in real life.
Also, will there be a decrease in batsmen's confidence if they are facing a fast bowler without a helmet, or will the only difference be a greater risk of injury to the batsman?