Hi Slicepong, happy new year!
To be honest most players do change their grip, even if it is just slightly from backhand to forehand. Our feeling is that as long as it’s not a huge change and restricting your play, slowing down your switching or recovery a small change is ok. I personally do change my grip slightly and have never found it to be a problem but I also know players who change grip and it is clearly slowing them down, so it is individual as everyone has slightly different grips.
So overall as long as it’s not a big change and making it hard to recover or switch quickly between backhands and forehands at higher speed then it’s not a problem. Only thing I would say is try to minimize the change as much as you can whilst still being comfortable on both sides, just to be as efficient as possible 🙂
