I started doing something similar a couple of weeks ago. I was always extremely rigid and had the sort of swing thoughts that get in the way, almost telling me what to do ‘steady, straight arm, cock wrist, that’s enough, swing slow...’ etc and for every decent drive I’d have a couple of bad ones, tops and low hooks mainly. The good ones weren’t even that good.
A few weeks ago I told myself to stop over thinking my drives, just set up and swing. I haven’t been recording or measuring but I’m definitely hitting it better, nicer flight and they feel longer. I feel much more relaxed and confident, whereas before I was very stressed on the tee!