Thanks for the great reply!Not sure about the Babolats, but Yonex has less butt cap flare. Use some old grip to increase the flare.
Summer time = more sweat which means less grip and you compensate by gripping the handle more. Try changing over grips aggressively.
As you mentioned more confidence might lead to playing harder. Concentrate on relaxing more on your shots, easier said than done.
If you can, drop the tension. It can be a drop only on the crosses if that is enough.
Keep the HyperG mains, but try a softer poly cross.
More wrist/arm stretches + exercises.