Customization Suggestions For T100 Comfort?

Having put 600 miles on my 2018 Bonneville T100 Black this past weekend on freeways out of Los Angeles and winding two-lane roads along the Central Coast, I'm hoping the forum has some suggestions to make my ride more comfortable: (1) My throttle hand is numb from vibrations and maybe wrist placement on the stock handlebars. Different handlebars or grips? (2) The stock tires really "wobble" on the "seam" while lane splitting, which is nerve wracking. (3) Is it possible to make the pipes louder, to signal my approach with an engine rev while lane splitting? Thanks!