I don't mean this to come across rude but I do have to chuckle at statements like this.
0.5oz (14g) in a 2lb 9.5 bat = 1%
But I totally understand handles not feeling quite right in the hands, and will tinker with tape under the grip to get if feeling just right.
Agreed. Weighing a bat straight away is not a good thing. When people come into the workshop, they often don't guess the weights of bats and will pick one up and say something like 'this feels lovely', then when they find out it's an oz or two heavier than their prefered dead weight, will soon look at something else.
I did a post on Instagram this week about handle thickness and how it affects the dead weight. I might start a thread on this, but it's similar to the binding post i made in this thread. You can use thinner thread, lighter grips, use tape instead etc etc all to hit scale weight. But imo the bat won't feel as good in the hands as one which is an oz or so heavier, but which has that weight in or near the hands.
Adding another grip will help the balance/pick up, but surely then add weight and cause further issues with cuts and pulls, if this is your concern?
If half an oz is causing issues on back foot shots, I'd. Keep the bat as is and do some bicep curls! 😂 That said, if it doesn't feel right to you and you can't get away from this, then it doesn't feel right. All points to buying another bat!