For those DMs and players who feel expertise needs to remain within bounded accuracy, what is the best fix.
One solution, expertise unlocks skill feats. For example, if gaining athletic expertise, maybe climb speed can be one of choices of athletic feats to choose from. Ambidexterity (Drow-like second of two-weapon attack uses flourish instead of bonus action?) could be a sleight of hand expertise choice. Or so on. PF2 seems to have skill feats, and might be a source of inspiration for 5e skill feats.
This thread has offered good ideas to replace expertise, including advantage (roll two d20s), elven accuracy feat (if advantage can reroll one of the two), rogue reliable talent (d20 increases to at least 10), add d6 bonus, maybe some others suggestions that I dont remember. All of these are good ideas, respect bounded accuracy, moreorless, and seem fair in exchange for the expertise number porn.
My difficulty is, all of these ideas would still make cringe if applied in combat. For example, if advantage always happens every attack, it is disruptive. In fact some classes (rogue) do connive a way to optimize advantage for virtually every attack. It doesnt seem to have ruined the game. So maybe expertise as advantage isnt too aggreving.
Maybe I could live with expertise as advantage, and opening up skill feats as fun design space. The rogue of course would get things like access to stealth feats or so on as part of expertise.
Any ideas?