To the original poster,
As a long time power and hand tool designer (I’ve designed tools for B&D, DeWALT, Craftsman, Ryobi, AEG and many others), I can tell you we’ve tried everything under the sun to provide enhanced grip and tactile feel outside of overmolding - often for various reasons aside from recycling. I tried to be a driving force for recycling / reuse/ end-of-life disassembly during my 12 years at B&D but my efforts were never embraced.
Many of the comments above (ie, users won’t disassemble it anyway) are sadly true but don’t let that stop you from trying, as we will only change the perceptions and actions of users with constant reinforcement of a more responsible way to do things - and it’ll take generations to do so.